Product Index

1-(3,4-dimethoxyphenyl)-5-oxopyrrolidine-3-carboxylic acid

Catalog No.: AA00VUJT

CAS No.:39629-91-9 MDL No.: MFCD07359854

MF: C13H15NO5 MW: 265.2619

Pricing and Availability

methyl 5-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl)-4-oxopentanoate

Catalog No.: AA00VUMB

CAS No.:109258-71-1 MDL No.: MFCD00591807

MF: C14H13NO5 MW: 275.2567

Pricing and Availability

propane-2-sulfonyl isocyanate

Catalog No.: AA00VUPR

CAS No.:89781-36-2 MDL No.: MFCD21879817

MF: C4H7NO3S MW: 149.1683

Pricing and Availability

1-(benzyloxy)-2-methylpropan-2-amine

Catalog No.: AA00VUS0

CAS No.:114377-40-1 MDL No.: MFCD19690988

MF: C11H17NO MW: 179.2588

Pricing and Availability

2,2-Dimethylpyrrolidin-3-ol

Catalog No.: AA00VUY1

CAS No.:1369250-18-9 MDL No.: MFCD22071621

MF: C6H13NO MW: 115.1735

Pricing and Availability

2-amino-4-oxopentanoic acid hydrochloride

Catalog No.: AA00VUY0

CAS No.:197237-27-7 MDL No.: MFCD22578633

MF: C5H10ClNO3 MW: 167.5908

Pricing and Availability

2-Bromo-5-fluoro-4-nitrophenol

Catalog No.: AA00VUVI

CAS No.:1369139-60-5 MDL No.: MFCD22034975

MF: C6H3BrFNO3 MW: 235.9953

Pricing and Availability

5-Methyloxazole-2-carbaldehyde

Catalog No.: AA00VUY6

CAS No.:1030585-89-7 MDL No.: MFCD03923822

MF: C5H5NO2 MW: 111.0987

Pricing and Availability

(4-ethoxy-3-methoxyphenyl)methanamine hydrochloride

Catalog No.: AA00VV3U

CAS No.:854184-85-3 MDL No.: MFCD10005083

MF: C10H16ClNO2 MW: 217.6925

Pricing and Availability

3-(aminomethyl)-4,4-dimethylpentanoic acid hydrochloride

Catalog No.: AA00VV42

CAS No.:1461713-77-8 MDL No.: MFCD25970449

MF: C8H18ClNO2 MW: 195.6870

Pricing and Availability

6-Bromoisoquinoline-1-carboxylic acid

Catalog No.: AA00VV3A

CAS No.:1256806-36-6 MDL No.: MFCD18257155

MF: C10H6BrNO2 MW: 252.0641

Pricing and Availability

tert-Butyl N-isopropylcarbamate

Catalog No.: AA00VV85

CAS No.:51170-55-9 MDL No.: MFCD02380471

MF: C8H17NO2 MW: 159.2261

Pricing and Availability

2-amino-3-hydroxy-3-phenylpropanoic acid hydrochloride

Catalog No.: AA00VV7G

CAS No.:860252-29-5 MDL No.: MFCD00508190

MF: C9H12ClNO3 MW: 217.6495

Pricing and Availability

2-amino-4-oxohexanoic acid hydrochloride

Catalog No.: AA00VVAJ

CAS No.:16631-46-2 MDL No.: MFCD23701917

MF: C6H12ClNO3 MW: 181.6174

Pricing and Availability

6-methylpyridine-3-sulfonyl chloride hydrochloride

Catalog No.: AA00VVE0

CAS No.:1210868-11-3 MDL No.: MFCD26593845

MF: C6H7Cl2NO2S MW: 228.0963

Pricing and Availability

3-methylazetidin-3-ol trifluoroacetat

Catalog No.: AA00VVAG

CAS No.:1104083-24-0 MDL No.: MFCD27977183

MF: C6H10F3NO3 MW: 201.1437

Pricing and Availability

2-amino-5,5-dimethyl-4-oxohexanoic acid hydrochloride

Catalog No.: AA00VVAK

CAS No.:1423024-68-3 MDL No.: MFCD22565912

MF: C8H16ClNO3 MW: 209.6705

Pricing and Availability

5-(morpholine-4-sulfonyl)furan-2-carboxylic acid

Catalog No.: AA00VV8K

CAS No.:361374-13-2 MDL No.: MFCD02320414

MF: C9H11NO6S MW: 261.2517

Pricing and Availability

3-Piperidinecarboxylicacid, 4-oxo-, methyl ester

Catalog No.: AA00VVGR

CAS No.:56026-52-9 MDL No.: MFCD00778678

MF: C7H12ClNO3 MW: 193.6281

Pricing and Availability

tert-Butyl 2-methyl-3-oxopyrrolidine-1-carboxylate

Catalog No.: AA00VV9U

CAS No.:1539946-20-7 MDL No.: MFCD22566674

MF: C10H17NO3 MW: 199.2469

Pricing and Availability

2-(aminomethyl)butanedioic acid hydrochloride

Catalog No.: AA00VVLE

CAS No.:70125-51-8 MDL No.: MFCD22628504

MF: C5H10ClNO4 MW: 183.5902

Pricing and Availability

ethyl 2-{benzyl[(tert-butoxy)carbonyl]amino}acetate

Catalog No.: AA00VVL9

CAS No.:136159-62-1 MDL No.: MFCD23723102

MF: C16H23NO4 MW: 293.3581

Pricing and Availability

4-amino-3-(methylsulfanyl)phenol

Catalog No.: AA00VVHW

CAS No.:37407-24-2 MDL No.: MFCD16998948

MF: C7H9NOS MW: 155.2175

Pricing and Availability

2-[(2-{[(tert-butoxy)carbonyl]amino}ethyl)sulfanyl]acetic acid

Catalog No.: AA00VVFF

CAS No.:1354714-62-7 MDL No.: MFCD26733161

MF: C9H17NO4S MW: 235.3006

Pricing and Availability

2-(aminomethyl)-2-methylbutanedioic acid hydrochloride

Catalog No.: AA00VVLF

CAS No.:86970-16-3 MDL No.: MFCD11041094

MF: C6H12ClNO4 MW: 197.6168

Pricing and Availability

4-(hydroxymethyl)-4-methylpyrrolidin-2-one

Catalog No.: AA00VVLH

CAS No.:1707714-77-9 MDL No.: MFCD27501008

MF: C6H11NO2 MW: 129.1570

Pricing and Availability

2-Methyl-5-phenyl-1,3-oxazole-4-sulfonyl chloride

Catalog No.: AA00VVME

CAS No.:1427380-74-2 MDL No.: MFCD18433464

MF: C10H8ClNO3S MW: 257.6934

Pricing and Availability

4-amino-3-(hydroxymethyl)-3-methylbutanoic acid hydrochloride

Catalog No.: AA00VVLG

CAS No.:1779125-35-7 MDL No.: MFCD27920349

MF: C6H14ClNO3 MW: 183.6333

Pricing and Availability

(5-methyl-1,3-oxazol-2-yl)methanol

Catalog No.: AA00VVBQ

CAS No.:888022-42-2 MDL No.: MFCD11110211

MF: C5H7NO2 MW: 113.1146

Pricing and Availability

2-methyl-6-phenoxyquinolin-4-ol

Catalog No.: AA00VW3J

CAS No.:56716-98-4 MDL No.: MFCD03847529

MF: C16H13NO2 MW: 251.2799

Pricing and Availability

4-[(2-chlorophenyl)methoxy]aniline hydrochloride

Catalog No.: AA00VVP9

CAS No.:1043471-44-8 MDL No.: MFCD02333245

MF: C13H13Cl2NO MW: 270.1544

Pricing and Availability

Ethyl 2-(4-Fluorophenyl)-4-methylthiazole-5-carboxylate

Catalog No.: AA00VWG7

CAS No.:317319-17-8 MDL No.: MFCD08443675

MF: C13H12FNO2S MW: 265.3033

Pricing and Availability

2-[2-(4-methylphenoxymethyl)-1,3-thiazol-4-yl]acetic acid

Catalog No.: AA00VWE1

CAS No.:875160-27-3 MDL No.: MFCD06858052

MF: C13H13NO3S MW: 263.3122

Pricing and Availability

ethyl 4-chlorobenzo[h]quinoline-3-carboxylate

Catalog No.: AA00VVN0

CAS No.:37041-30-8 MDL No.: MFCD01917118

MF: C16H12ClNO2 MW: 285.7250

Pricing and Availability

4-ethyl 2-(2-methoxyethyl) 5-amino-3-methylthiophene-2,4-dicarboxylate

Catalog No.: AA00VW3N

CAS No.:556016-30-9 MDL No.: MFCD04610259

MF: C12H17NO5S MW: 287.3321

Pricing and Availability

4-Methyl-2-(3,4-dichlorophenyl)thiazole-5-carboxylic acid

Catalog No.: AA00VWDZ

CAS No.:343322-58-7 MDL No.: MFCD06857943

MF: C11H7Cl2NO2S MW: 288.1498

Pricing and Availability

(4-(4-Chlorophenyl)tetrahydro-2H-pyran-4-yl)methanamine hydrochloride

Catalog No.: AA00VWNQ

CAS No.:1210893-58-5 MDL No.: MFCD11043049

MF: C12H17Cl2NO MW: 262.1755

Pricing and Availability

4-(morpholine-4-sulfonyl)benzoyl chloride

Catalog No.: AA00VWML

CAS No.:654682-86-7 MDL No.: MFCD09702532

MF: C11H12ClNO4S MW: 289.7353

Pricing and Availability

2-((2-[(Cyclohexylmethyl)amino]-2-oxoethyl)thio)benzoic acid

Catalog No.: AA00VWGO

CAS No.:793716-20-8 MDL No.: MFCD06364486

MF: C16H21NO3S MW: 307.4078

Pricing and Availability

[1-(2-methoxyphenyl)cyclopentyl]methanamine

Catalog No.: AA00VWNP

CAS No.:927993-53-1 MDL No.: MFCD09261728

MF: C13H19NO MW: 205.2961

Pricing and Availability

[1-(2-methoxyphenyl)cyclopropyl]methanamine

Catalog No.: AA00VWNN

CAS No.:886365-72-6 MDL No.: MFCD07374422

MF: C11H15NO MW: 177.2429

Pricing and Availability

2-(2-Acetyl-1,2,3,4-tetrahydroisoquinolin-1-yl)acetic acid

Catalog No.: AA00VWXS

CAS No.:53921-74-7 MDL No.: MFCD02323216

MF: C13H15NO3 MW: 233.2631

Pricing and Availability

[1-(2-Methoxyphenyl)cyclobutyl]methanamine

Catalog No.: AA00VWNO

CAS No.:927993-47-3 MDL No.: MFCD09261725

MF: C12H17NO MW: 191.2695

Pricing and Availability

2-(1,2,3,4-tetrahydroisoquinolin-1-yl)acetic acid hydrochloride

Catalog No.: AA00VWXN

CAS No.:53014-68-9 MDL No.: MFCD01940329

MF: C11H14ClNO2 MW: 227.6874

Pricing and Availability

2-[4-chloro-3-(trifluoromethyl)benzenesulfonamido]acetic acid

Catalog No.: AA00W187

CAS No.:612043-42-2 MDL No.: MFCD03619019

MF: C9H7ClF3NO4S MW: 317.6694

Pricing and Availability

3-(4-tert-butylbenzenesulfonamido)propanoic acid

Catalog No.: AA00W136

CAS No.:453581-51-6 MDL No.: MFCD02361173

MF: C13H19NO4S MW: 285.3593

Pricing and Availability

N-(2-methyl-1-phenylpropyl)benzenesulfonamide

Catalog No.: AA00W9LS

CAS No.:117583-62-7 MDL No.: MFCD00956415

MF: C16H19NO2S MW: 289.3926

Pricing and Availability

2-(2,6-dichlorobenzenesulfonamido)-3-methylbutanoic acid

Catalog No.: AA00W17I

CAS No.:1008267-76-2 MDL No.: MFCD04621641

MF: C11H13Cl2NO4S MW: 326.1962

Pricing and Availability

4-(((1,1-Dioxidotetrahydrothiophen-3-yl)amino)methyl)benzoic acid

Catalog No.: AA00W3DD

CAS No.:170938-29-1 MDL No.: MFCD01764693

MF: C12H15NO4S MW: 269.3168

Pricing and Availability

1-(4-methanesulfonylphenyl)pyrrolidine-2-carboxylic acid

Catalog No.: AA00WJHP

CAS No.:1330783-57-7 MDL No.: MFCD08692421

MF: C12H15NO4S MW: 269.3168

Pricing and Availability

1-Phenyl-2-(quinolin-2-yl)ethanone

Catalog No.: AA00WUIW

CAS No.:1531-38-0 MDL No.: MFCD10694866

MF: C17H13NO MW: 247.2912

Pricing and Availability

(4-[(2,4-Dichlorobenzyl)oxy]phenyl)amine

Catalog No.: AA00WNYT

CAS No.:53397-81-2 MDL No.: MFCD08753566

MF: C13H11Cl2NO MW: 268.1385

Pricing and Availability

3,5-di-tert-butyl-4-hydroxybenzene-1-carbothioamide

Catalog No.: AA00WZ8N

CAS No.:112163-13-0 MDL No.: MFCD00961838

MF: C15H23NOS MW: 265.4142

Pricing and Availability

Methyl 3-amino-4-methyl-5-phenylthiophene-2-carboxylate

Catalog No.: AA00Z6EL

CAS No.:160133-79-9 MDL No.: MFCD04116407

MF: C13H13NO2S MW: 247.3128

Pricing and Availability

4-bromo-N-(4-fluoro-3-methylphenyl)benzene-1-sulfonamide

Catalog No.: AA014B7Q

CAS No.:1485880-01-0 MDL No.: MFCD17589080

MF: C13H11BrFNO2S MW: 344.1993

Pricing and Availability

2-(4-Methoxyphenoxy)ethanamine hydrochloride

Catalog No.: AA0166KI

CAS No.:98959-77-4 MDL No.: MFCD06409255

MF: C9H14ClNO2 MW: 203.6660

Pricing and Availability

2-(4-bromophenoxy)-6-(trifluoromethyl)pyridine

Catalog No.: AA010NH6

CAS No.:1086376-15-9 MDL No.: MFCD10703540

MF: C12H7BrF3NO MW: 318.0893

Pricing and Availability

2-(2,6-dioxopiperidin-1-yl)ethanesulfonyl chloride

Catalog No.: AA0166S6

CAS No.:1000339-13-8 MDL No.: MFCD09864173

MF: C7H10ClNO4S MW: 239.6766

Pricing and Availability

(2Z)-3-(Cyclopropylcarbamoyl)prop-2-enoic acid

Catalog No.: AA0167BE

CAS No.:27995-78-4 MDL No.: MFCD11109078

MF: C7H9NO3 MW: 155.1513

Pricing and Availability

Pyridin-3-yl(4-(trifluoromethyl)phenyl)methanone

Catalog No.: AA012YRC

CAS No.:21221-92-1 MDL No.: MFCD13152905

MF: C13H8F3NO MW: 251.2039

Pricing and Availability

1-(Isocyanatomethyl)naphthalene

Catalog No.: AA0169GQ

CAS No.:61924-27-4 MDL No.: MFCD11986936

MF: C12H9NO MW: 183.2060

Pricing and Availability

(2E)-2-cyano-3-(3,4-dimethoxyphenyl)acrylic acid

Catalog No.: AA0169N7

CAS No.:37630-52-7 MDL No.: MFCD00186257

MF: C12H11NO4 MW: 233.2200

Pricing and Availability

7-Bromo-2,3-dihydrobenzo[b][1,4]dioxin-6-amine

Catalog No.: AA016A56

CAS No.:368839-12-7 MDL No.: MFCD00462568

MF: C8H8BrNO2 MW: 230.0586

Pricing and Availability

2-Cyclopropylisonicotinic acid

Catalog No.: AA016WN6

CAS No.:1216171-07-1 MDL No.: MFCD13187883

MF: C9H9NO2 MW: 163.1733

Pricing and Availability

Isocyanatomethyl-cyclopropane

Catalog No.: AA01732H

CAS No.:25694-89-7 MDL No.: MFCD16665719

MF: C5H7NO MW: 97.1152

Pricing and Availability

N-(4-Fluoro-phenyl)-4-methyl-benzenesulfonamide

Catalog No.: AA0177IS

CAS No.:727-31-1 MDL No.: MFCD00595010

MF: C13H12FNO2S MW: 265.3033

Pricing and Availability

Cyclopropylmethyl-(2,2-dimethoxy-ethyl)-amine

Catalog No.: AA017ABX

CAS No.:1104193-66-9 MDL No.: MFCD12157749

MF: C8H17NO2 MW: 159.2261

Pricing and Availability

6-Propoxynicotinic acid

Catalog No.: AA017F9D

CAS No.:861045-09-2 MDL No.: MFCD11619133

MF: C9H11NO3 MW: 181.1885

Pricing and Availability

3,3-difluoro-4-(4-methoxyphenyl)-1-phenylazetidin-2-one

Catalog No.: AA0183LE

CAS No.:342779-66-2 MDL No.: MFCD02324363

MF: C16H13F2NO2 MW: 289.2767

Pricing and Availability

2-Amino-1-cyclopropylethanol

Catalog No.: AA017KCU

CAS No.:54120-02-4 MDL No.: MFCD11043287

MF: C5H11NO MW: 101.1469

Pricing and Availability

cis-4-Decenoyl carnitine

Catalog No.: AA018625

CAS No.:98930-66-6 MDL No.: MFCD18642153

MF: C17H31NO4 MW: 313.4323

Pricing and Availability

9-Octadecenoyl carnitine

Catalog No.: AA018631

CAS No.:38677-66-6 MDL No.: MFCD22416941

MF: C25H47NO4 MW: 425.6450

Pricing and Availability

1-(4-Chloro-benzenesulfonylamino)-cyclohexanecarboxylic acid

Catalog No.: AA018B4O

CAS No.:314744-46-2 MDL No.: MFCD02081088

MF: C13H16ClNO4S MW: 317.7884

Pricing and Availability

6-Ethoxy-3-azabicyclo[3.1.1]heptane

Catalog No.: AA0186OX

CAS No.:2097983-04-3 MDL No.: MFCD29996593

MF: C8H15NO MW: 141.2108

Pricing and Availability

1-(4-Methoxybenzyl)piperidin-4-ol

Catalog No.: AA018ACQ

CAS No.:21937-59-7 MDL No.: MFCD01652560

MF: C13H19NO2 MW: 221.2955

Pricing and Availability

methyl 2-methoxyquinoline-4-carboxylate

Catalog No.: AA018BNC

CAS No.:115801-85-9 MDL No.: MFCD25955997

MF: C12H11NO3 MW: 217.2206

Pricing and Availability

6-(Furan-2-yl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid

Catalog No.: AA018FNK

CAS No.:56304-44-0 MDL No.: MFCD14705688

MF: C10H7NO4 MW: 205.1669

Pricing and Availability

N-(4-(Chloromethyl)-2-oxo-2H-chromen-7-yl)acetamide

Catalog No.: AA018FLJ

CAS No.:447398-67-6 MDL No.: MFCD04610166

MF: C12H10ClNO3 MW: 251.6657

Pricing and Availability

[5-(2,4-difluorophenyl)isoxazol-3-yl]methanol

Catalog No.: AA018FS3

CAS No.:934188-81-5 MDL No.: MFCD09752378

MF: C10H7F2NO2 MW: 211.1649

Pricing and Availability

2-Chloro-5,6,7,8-tetrahydroquinolin-5-ol

Catalog No.: AA018FL5

CAS No.:501917-22-2 MDL No.: MFCD08692080

MF: C9H10ClNO MW: 183.6348

Pricing and Availability

3-(Chloromethyl)-5-(3-methoxyphenyl)isoxazole

Catalog No.: AA018FS8

CAS No.:934063-64-6 MDL No.: MFCD06805615

MF: C11H10ClNO2 MW: 223.6556

Pricing and Availability

5-oxo-hexahydropyrrolo[2,1-b][1,3]thiazole-7a-carboxylic acid

Catalog No.: AA018FLH

CAS No.:155796-08-0 MDL No.: MFCD06342750

MF: C7H9NO3S MW: 187.2163

Pricing and Availability

2-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)ethanesulfonate potassium

Catalog No.: AA018G4J

CAS No.:91893-72-0 MDL No.: MFCD00023093

MF: C10H8NO5S- MW: 254.2392

Pricing and Availability

tert-butyl 3-oxo-2-oxa-5-azabicyclo[2.2.1]heptane-5-carboxylate

Catalog No.: AA018GA3

CAS No.:87250-97-3 MDL No.: MFCD22587752

MF: C10H15NO4 MW: 213.2304

Pricing and Availability

methyl 2-oxo-4-phenylpyrrolidine-3-carboxylate

Catalog No.: AA018GK3

CAS No.:55790-17-5 MDL No.: MFCD01951854

MF: C12H13NO3 MW: 219.2365

Pricing and Availability

2,1-benzisothiazol-3(1H)-one

Catalog No.: AA018GK2

CAS No.:40352-87-2 MDL No.: MFCD00127754

MF: C7H5NOS MW: 151.1857

Pricing and Availability

2-(3-Bromophenyl)-2-((tert-butoxycarbonyl)amino)acetic acid

Catalog No.: AA018GOD

CAS No.:446305-66-4 MDL No.: MFCD07388845

MF: C13H16BrNO4 MW: 330.1744

Pricing and Availability

2-amino-4-[4-(trifluoromethyl)phenyl]butanoic acid

Catalog No.: AA018GPC

CAS No.:1214098-81-3 MDL No.: MFCD07372273

MF: C11H12F3NO2 MW: 247.2137

Pricing and Availability

1-cyclopropyl-4-(hydroxymethyl)pyrrolidin-2-one

Catalog No.: AA018GPS

CAS No.:1017456-88-0 MDL No.: MFCD10003979

MF: C8H13NO2 MW: 155.1943

Pricing and Availability

1-(1,3-benzodioxol-5-ylcarbonyl)azetidine-3-carboxylic acid

Catalog No.: AA018GUU

CAS No.:1350989-18-2 MDL No.: MFCD21378267

MF: C12H11NO5 MW: 249.2194

Pricing and Availability

2-(ethanesulfinyl)ethan-1-amine hydrochloride

Catalog No.: AA018GTQ

CAS No.:176240-96-3 MDL No.: MFCD18483214

MF: C4H11NOS MW: 121.2012

Pricing and Availability

5-oxo-1-(tetrahydro-2H-pyran-4-yl)pyrrolidine-3-carboxylic acid

Catalog No.: AA018GV4

CAS No.:1155632-03-3 MDL No.: MFCD12088286

MF: C10H15NO4 MW: 213.2304

Pricing and Availability

Acetic acid 2-formyl-quinolin-8-yl ester

Catalog No.: AA018GXB

CAS No.:36456-52-7 MDL No.: MFCD07364750

MF: C12H9NO3 MW: 215.2048

Pricing and Availability

4-(oxolan-3-yloxy)aniline

Catalog No.: AA018GYW

CAS No.:307309-28-0 MDL No.: MFCD18364532

MF: C10H13NO2 MW: 179.2157

Pricing and Availability

2-(2-isothiocyanatoethyl)tetrahydrofuran

Catalog No.: AA018GXF

CAS No.:1249941-39-6 MDL No.: MFCD16110086

MF: C7H11NOS MW: 157.2333

Pricing and Availability

tert-Butyl 3-((chlorocarbonyl)oxy)azetidine-1-carboxylate

Catalog No.: AA018GWF

CAS No.:1009368-28-8 MDL No.: MFCD24387654

MF: C9H14ClNO4 MW: 235.6648

Pricing and Availability

2-Bromo-3-((tetrahydrofuran-3-yl)oxy)pyridine

Catalog No.: AA018H3T

CAS No.:1451390-75-2 MDL No.: MFCD21162926

MF: C9H10BrNO2 MW: 244.0852

Pricing and Availability

2-((Tetrahydrofuran-3-yl)oxy)aniline

Catalog No.: AA018GZ3

CAS No.:917909-29-6 MDL No.: MFCD18364544

MF: C10H13NO2 MW: 179.2157

Pricing and Availability

2-bromo-3-(prop-2-yn-1-yloxy)pyridine

Catalog No.: AA018H3X

CAS No.:1488558-53-7 MDL No.: MFCD21138278

MF: C8H6BrNO MW: 212.0433

Pricing and Availability

6-Isobutoxynicotinic acid

Catalog No.: AA018H42

CAS No.:1016756-23-2 MDL No.: MFCD09811820

MF: C10H13NO3 MW: 195.2151

Pricing and Availability