Product Index

ethyl 5-(3-cyanophenyl)-1H-1,2,4-triazole-3-carboxylate

Catalog No.: AA01BDI0

CAS No.:1284001-05-3 MDL No.: MFCD19482168

MF: C12H10N4O2 MW: 242.2334

Pricing and Availability

Benzoic acid, 4-(acetyloxy)-3-bromo-, ethyl ester

Catalog No.: AA000XZA

CAS No.:128401-55-8 MDL No.: MFCD11113005

MF: C11H11BrO4 MW: 287.1066

Pricing and Availability

6-Hydroxyflavone-beta-D-glucoside

Catalog No.: AA01EAMS

CAS No.:128401-92-3 MDL No.: MFCD00017697

MF: C21H20O8 MW: 400.3787

Pricing and Availability

N-(1-carbamothioylcyclohexyl)benzamide

Catalog No.: AA01AHRV

CAS No.:1284015-89-9 MDL No.: MFCD11052533

MF: C14H18N2OS MW: 262.3705

Pricing and Availability

5,5-dimethyl-2-[(trifluoromethyl)sulfanyl]-1,3-cyclohexanedione

Catalog No.: AA01CAWL

CAS No.:128402-12-0 MDL No.: MFCD00526214

MF: C9H11F3O2S MW: 240.2426

Pricing and Availability

1-(2-Nitro-4-(trifluoromethyl)phenyl)ethanone

Catalog No.: AA000XZ7

CAS No.:128403-22-5 MDL No.: MFCD00179139

MF: C9H6F3NO3 MW: 233.1440

Pricing and Availability

2-formamido-N-isopropylacetamide

Catalog No.: AA0295RM

CAS No.:128404-32-0 MDL No.:

MF: MW:

Pricing and Availability

N-benzyl-2-formamidoacetamide

Catalog No.: AA0295RO

CAS No.:128404-35-3 MDL No.:

MF: MW:

Pricing and Availability

(S)-2,2,2-Trifluoro-1-phenylethylamine hcl

Catalog No.: AA000XZ5

CAS No.:128404-37-5 MDL No.: MFCD07776797

MF: C8H9ClF3N MW: 211.6120

Pricing and Availability

1-(3-Chloropyridin-2-yl)propan-2-one

Catalog No.: AA01AL77

CAS No.:1284045-45-9 MDL No.: MFCD18287406

MF: C8H8ClNO MW: 169.6082

Pricing and Availability

1-[6-(2-methylphenyl)pyridazin-3-yl]piperidine-3-carboxylic acid

Catalog No.: AA0262MM

CAS No.:1284048-95-8 MDL No.: MFCD16992317

MF: C17H19N3O2 MW: 297.3517

Pricing and Availability

2,11-diamino-4,9-bis(4-methoxyphenyl)-4,9-dihydrobenzo[f]pyrano[3,2-h]chromene-3,10-dicarbonitrile

Catalog No.: AA029A3C

CAS No.:128405-07-2 MDL No.:

MF: C32H24N4O4 MW: 528.5574

Pricing and Availability

2-Hydroxyphenylcyclopropyl ketone

Catalog No.: AA009YRQ

CAS No.:128405-69-6 MDL No.: MFCD24703561

MF: C10H10O2 MW: 162.1852

Pricing and Availability

2-{8-methyl-4-oxo-1H,4H-chromeno[4,3-c]pyrazol-1-yl}aceticacid

Catalog No.: AA028XQT

CAS No.:1284054-92-7 MDL No.: MFCD15730213

MF: C13H10N2O4 MW: 258.2295

Pricing and Availability

9,9-Bis(4-bromophenyl)fluorene

Catalog No.: AA000XZ3

CAS No.:128406-10-0 MDL No.: MFCD19707068

MF: C25H16Br2 MW: 476.2025

Pricing and Availability

1-(4-Bromo-2-nitrophenyl)-N,N-dimethylpiperidin-4-amine

Catalog No.: AA021D7J

CAS No.:1284067-58-8 MDL No.:

MF: MW:

Pricing and Availability

1-cyclopropylpiperidin-3-ol

Catalog No.: AA0289I8

CAS No.:1284067-82-8 MDL No.: MFCD16496568

MF: C8H15NO MW: 141.2108

Pricing and Availability

2-Phenyl-2-thiomorpholinoacetonitrile

Catalog No.: AA00HRQ0

CAS No.:128407-23-8 MDL No.: MFCD00100740

MF: C12H14N2S MW: 218.3180

Pricing and Availability

2-(dimethoxymethyl)-5-methyl-1,3,4-oxadiazole

Catalog No.: AA028DZS

CAS No.:1284075-63-3 MDL No.: MFCD16497161

MF: C6H10N2O3 MW: 158.1552

Pricing and Availability

ethyl (E)-3-(4-isopropylphenyl)acrylate

Catalog No.: AA01WJN4

CAS No.:128408-02-6 MDL No.:

MF: MW:

Pricing and Availability

4-Amino-2-methyl-piperidine-1-carboxylic acid benzyl ester

Catalog No.: AA00HRQ1

CAS No.:1284084-57-6 MDL No.: MFCD16497057

MF: C14H20N2O2 MW: 248.3208

Pricing and Availability

Benzyl 3-bromopiperidine-1-carboxylate

Catalog No.: AA00A5H4

CAS No.:1284084-76-9 MDL No.: MFCD16496439

MF: C13H16BrNO2 MW: 298.1756

Pricing and Availability

1-(4-Bromophenyl)-2-(2-nitrophenyl)ethanol

Catalog No.: AA01ENBW

CAS No.:1284088-91-0 MDL No.: MFCD18053270

MF: C14H12BrNO3 MW: 322.1540

Pricing and Availability

4-[4-(2,2,2-trifluoroethyl)piperazin-1-yl]butanoic acid

Catalog No.: AA01KU3B

CAS No.:1284096-45-2 MDL No.:

MF: C10H17F3N2O2 MW: 254.2494

Pricing and Availability

2-chloro-4-(2,4-dichlorophenoxy)benzaldehyde

Catalog No.: AA01E84X

CAS No.:1284098-16-3 MDL No.: MFCD24540163

MF: C13H7Cl3O2 MW: 301.5525

Pricing and Availability

Catalog No.: AA027C6D

CAS No.:1284108-49-1 MDL No.:

MF: MW:

Pricing and Availability

3-chloro-2-(pyrrolidin-3-yloxy)-5-(trifluoromethyl)pyridine

Catalog No.: AA011TOU

CAS No.:1284108-82-2 MDL No.: MFCD17962974

MF: C10H10ClF3N2O MW: 266.6474

Pricing and Availability

Benzyl 3-(Cyclopropylamino)piperidine-1-carboxylate

Catalog No.: AA000XYW

CAS No.:1284112-64-6 MDL No.: MFCD16496430

MF: C16H22N2O2 MW: 274.3581

Pricing and Availability

1-decyl-1H-pyrazole-4-carboxylic acid

Catalog No.: AA0143RX

CAS No.:1284118-61-1 MDL No.: MFCD19497972

MF: C14H24N2O2 MW: 252.3526

Pricing and Availability

(3-Bromo-1-methylpropyl)carbamic acid tert-butyl ester

Catalog No.: AA00A5E5

CAS No.:128412-15-7 MDL No.: MFCD22576327

MF: C9H18BrNO2 MW: 252.1487

Pricing and Availability

2-(1-aminocyclopentyl)-6-(thiophen-2-yl)-3,4-dihydropyrimidin-4-one

Catalog No.: AA019SGT

CAS No.:1284129-44-7 MDL No.: MFCD19499469

MF: C13H15N3OS MW: 261.3427

Pricing and Availability

Catalog No.: AA021SZZ

CAS No.:1284130-45-5 MDL No.:

MF: MW:

Pricing and Availability

(2,4-Dimethoxyphenyl)(thiophen-2-yl)methanol

Catalog No.: AA01FC7U

CAS No.:1284131-03-8 MDL No.: MFCD07775501

MF: C13H14O3S MW: 250.3135

Pricing and Availability

2-{[3-(3-methoxyphenyl)-1,2,4-oxadiazol-5-yl]sulfanyl}acetic acid

Catalog No.: AA01A5G1

CAS No.:1284136-51-1 MDL No.: MFCD18046433

MF: C11H10N2O4S MW: 266.2731

Pricing and Availability

(4-Butylthiophen-3-yl)(phenyl)methanol

Catalog No.: AA00YRP2

CAS No.:1284139-71-4 MDL No.: MFCD30063602

MF: C15H18OS MW: 246.3678

Pricing and Availability

3-Fluoro-4-(pyrrolidine-1-carbonyl)benzene-1-sulfonyl chloride

Catalog No.: AA01A2S8

CAS No.:1284141-37-2 MDL No.: MFCD16508642

MF: C11H11ClFNO3S MW: 291.7263

Pricing and Availability

3-fluoro-4-(4-iodophenoxymethyl)benzamide

Catalog No.: AA01A04Y

CAS No.:1284147-09-6 MDL No.: MFCD16386198

MF: C14H11FINO2 MW: 371.1455

Pricing and Availability

Azeliragon HCl (TTP488; PF-04494700)

Catalog No.: AA01XAAZ

CAS No.:1284150-65-7 MDL No.:

MF: C32H40Cl3N3O2 MW: 605.0379

Pricing and Availability

Catalog No.: AA021C6Q

CAS No.:1284156-83-7 MDL No.:

MF: MW:

Pricing and Availability

2-chloro-6-{5H,6H,7H,8H-imidazo[1,2-a]pyrazin-7-yl}pyridine-4-carboxylic acid

Catalog No.: AA01A2LV

CAS No.:1284159-82-5 MDL No.: MFCD18054590

MF: C12H11ClN4O2 MW: 278.6943

Pricing and Availability

(R)-3-(3'-Acetyl-[1,1'-biphenyl]-4-yl)-2-aminopropanoic acid hydrochloride

Catalog No.: AA01DON3

CAS No.:1284163-33-2 MDL No.: MFCD13172267

MF: C17H18ClNO3 MW: 319.7827

Pricing and Availability

Methyl 4-(tert-butoxycarbonylamino)-1H-indole-3-carboxylate

Catalog No.: AA009IGV

CAS No.:1284163-34-3 MDL No.: MFCD17779263

MF: C15H18N2O4 MW: 290.3144

Pricing and Availability

3-nitro-4-(piperidin-4-ylmethoxy)pyridine

Catalog No.: AA011TQ4

CAS No.:1284167-62-9 MDL No.: MFCD17963024

MF: C11H15N3O3 MW: 237.2551

Pricing and Availability

3-propan-2-yl-6-(trifluoromethyl)-1,2,3,4-tetrahydroquinoline

Catalog No.: AA01DV41

CAS No.:1284173-40-5 MDL No.: MFCD19482333

MF: C13H16F3N MW: 243.2680

Pricing and Availability

3-Bromo-4-(3-fluorophenoxy)benzene-1-sulfonyl chloride

Catalog No.: AA01B8D4

CAS No.:1284177-46-3 MDL No.: MFCD16512199

MF: C12H7BrClFO3S MW: 365.6026

Pricing and Availability

3-((4-(Trifluoromethyl)phenyl)amino)benzoic acid

Catalog No.: AA000XZX

CAS No.:1284180-11-5 MDL No.: MFCD28016823

MF: C14H10F3NO2 MW: 281.2299

Pricing and Availability

2-methyl-5-(3-methyl-5-isoxazolyl)benzenesulfonyl chloride

Catalog No.: AA00J2DW

CAS No.:1284186-31-7 MDL No.: MFCD15729895

MF: C11H10ClNO3S MW: 271.7200

Pricing and Availability

N-((Tetrahydro-2H-pyran-4-yl)methyl)-2-(m-tolyl)ethanamine

Catalog No.: AA020DYK

CAS No.:1284195-65-8 MDL No.: MFCD17340087

MF: C15H23NO MW: 233.3492

Pricing and Availability

methyl[(1,2-thiazol-5-yl)methyl]amine

Catalog No.: AA01B1XQ

CAS No.:1284196-75-3 MDL No.: MFCD16497136

MF: C5H8N2S MW: 128.1954

Pricing and Availability

Gelidoside

Catalog No.: AA01V30Q

CAS No.:128420-44-0 MDL No.:

MF: C35H42O21 MW: 798.6954

Pricing and Availability

E 5880

Catalog No.: AA009DIZ

CAS No.:128420-61-1 MDL No.:

MF: C46H73ClN4O9 MW: 861.5462

Pricing and Availability

Minocycline hydrochloride dihydrate

Catalog No.: AA01DOS9

CAS No.:128420-71-3 MDL No.: MFCD13562735

MF: C23H32ClN3O9 MW: 529.9679

Pricing and Availability

N-ethyl-2-formamidoacetamide

Catalog No.: AA0295RH

CAS No.:128421-78-3 MDL No.:

MF: MW:

Pricing and Availability

7-methoxy-3-phenyl-1,2,3,4-tetrahydroisoquinoline

Catalog No.: AA019ZRX

CAS No.:1284210-24-7 MDL No.: MFCD18013604

MF: C16H17NO MW: 239.3123

Pricing and Availability

Carbamic acid, N-(3-bromo-5-methyl-2-pyridinyl)-, 1,1-dimethylethyl ester

Catalog No.: AA000XZW

CAS No.:1284210-79-2 MDL No.: MFCD23135696

MF: C11H15BrN2O2 MW: 287.1530

Pricing and Availability

Ethyl 2-(4'-(4-((tert-butoxycarbonyl)amino)-3-methylisoxazol-5-yl)-[1,1'-biphenyl]-4-yl)acetate

Catalog No.: AA01V7P5

CAS No.:1284212-82-3 MDL No.:

MF: C25H28N2O5 MW: 436.5002

Pricing and Availability

4-Methyl-1h-pyrazole-3,5-diamine

Catalog No.: AA00HRQ4

CAS No.:1284219-41-5 MDL No.: MFCD12548036

MF: C4H8N4 MW: 112.1331

Pricing and Availability

4-[5-(4-fluorophenyl)-1H-pyrazole-3-carbonyl]morpholine

Catalog No.: AA025P8O

CAS No.:1284219-68-6 MDL No.:

MF: C14H14FN3O2 MW: 275.2783

Pricing and Availability

Ethyl 3-(3,4-dichlorophenyl)-1h-pyrazole-5-carboxylate

Catalog No.: AA00HRQ5

CAS No.:1284219-86-8 MDL No.: MFCD13248667

MF: C12H10Cl2N2O2 MW: 285.1260

Pricing and Availability

4-Methyl-3-(trifluoromethyl)-1H-pyrazole-5-carbaldehyde

Catalog No.: AA01AFNP

CAS No.:1284219-94-8 MDL No.: MFCD12548026

MF: C6H5F3N2O MW: 178.1119

Pricing and Availability

Catalog No.: AA024WDK

CAS No.:128422-18-4 MDL No.:

MF: MW:

Pricing and Availability

Benzoic acid, 4-(2-propen-1-yloxy)-, 4-hydroxyphenyl ester

Catalog No.: AA000Y07

CAS No.:128422-75-3 MDL No.: MFCD11042377

MF: C16H14O4 MW: 270.2800

Pricing and Availability

3-Cyclopropyl-1h-pyrazole-5-carbaldehyde

Catalog No.: AA009JDS

CAS No.:1284220-47-8 MDL No.: MFCD12548034

MF: C7H8N2O MW: 136.1512

Pricing and Availability

5-(Difluoromethyl)-1h-pyrazol-3-amine

Catalog No.: AA000XZV

CAS No.:1284220-49-0 MDL No.: MFCD23105881

MF: C4H5F2N3 MW: 133.0994

Pricing and Availability

4-methyl-1H-pyrazole-3-carbaldehyde

Catalog No.: AA009JC2

CAS No.:1284220-50-3 MDL No.: MFCD12548027

MF: C5H6N2O MW: 110.1139

Pricing and Availability

4-(Morpholin-2-yl)aniline

Catalog No.: AA01DV42

CAS No.:1284221-31-3 MDL No.: MFCD20257683

MF: C10H14N2O MW: 178.2310

Pricing and Availability

4-[2-(dimethylamino)ethyl]-1,4-diazepan-5-one diethanedioate

Catalog No.: AA00J37S

CAS No.:1284225-04-2 MDL No.: MFCD08448220

MF: C13H23N3O9 MW: 365.3364

Pricing and Availability

[(5-methylimidazo[1,2-a]pyridin-2-yl)methyl]amine dihydrochloride

Catalog No.: AA00J39L

CAS No.:1284225-59-7 MDL No.: MFCD08448227

MF: C9H13Cl2N3 MW: 234.1256

Pricing and Availability

1H-Imidazole-4,5-dicarboxylic acid, 2,3-dihydro-2-oxo-1,3-bis(phenylmethyl)-

Catalog No.: AA01SNPX

CAS No.:1284225-61-1 MDL No.: MFCD03701609

MF: C19H16N2O5 MW: 352.3407

Pricing and Availability

Ethyl 2-(trifluoromethyl)indolizine-1-carboxylate

Catalog No.: AA019EV0

CAS No.:1284226-15-8 MDL No.: MFCD08447583

MF: C12H10F3NO2 MW: 257.2085

Pricing and Availability

2-Amino-6-ethoxycarbonyl-5,6,7,8-tetrahydro-4-(trifluoromethyl)pyrido-[4,3-d]-pyrimidine

Catalog No.: AA01MCJP

CAS No.:1284226-30-7 MDL No.: MFCD08447413

MF: C11H13F3N4O2 MW: 290.2417

Pricing and Availability

[(7-methylimidazo[1,2-a]pyridin-2-yl)methyl]amine dihydrochloride

Catalog No.: AA00J39I

CAS No.:1284226-43-2 MDL No.: MFCD13193986

MF: C9H13Cl2N3 MW: 234.1256

Pricing and Availability

6-Ethoxycarbonyl-5,6,7,8-tetrahydro-2-hydroxy-4-(trifluoromethyl)pyrido-[4,3-d]-pyrimidine

Catalog No.: AA01MCAE

CAS No.:1284226-65-8 MDL No.: MFCD08447412

MF: C11H12F3N3O3 MW: 291.2265

Pricing and Availability

[(6-methylimidazo[1,2-a]pyridin-2-yl)methyl]amine dihydrochloride

Catalog No.: AA00J39N

CAS No.:1284226-68-1 MDL No.: MFCD08448230

MF: C9H13Cl2N3 MW: 234.1256

Pricing and Availability

Imidazo[2,1-b]benzothiazole-2-carboxylic acid, hydrate (1:1)

Catalog No.: AA000XZU

CAS No.:1284226-74-9 MDL No.: MFCD08444056

MF: C10H8N2O3S MW: 236.2471

Pricing and Availability

1-{3-[(5-Bromopentyl)oxy]phenyl}ethan-1-one

Catalog No.: AA01T2Q5

CAS No.:1284226-89-6 MDL No.: MFCD08447951

MF: C13H17BrO2 MW: 285.1769

Pricing and Availability

(1-methylpyrrolidin-3-yl)methanamine

Catalog No.: AA000XZT

CAS No.:1284226-96-5 MDL No.: MFCD28131961

MF: C6H16Cl2N2 MW: 187.1106

Pricing and Availability

(+/-)-Trans-4-(3-fluoro-phenyl)-pyrrolidine-3-carboxylic acid hydrochloride

Catalog No.: AA00HRQ6

CAS No.:1284227-02-6 MDL No.: MFCD06659257

MF: C11H13ClFNO2 MW: 245.6778

Pricing and Availability

2-BROMO-4-FLUOROPHENYL CHLOROTHIOFORMATE

Catalog No.: AA009D9V

CAS No.:1284227-56-0 MDL No.: MFCD03425094

MF: C7H3BrClFOS MW: 269.5185

Pricing and Availability

5,7-Difluoroindoline hydrochloride

Catalog No.: AA01K11F

CAS No.:1284227-65-1 MDL No.: MFCD08448223

MF: C8H8ClF2N MW: 191.6056

Pricing and Availability

Catalog No.: AA02AJFM

CAS No.:1284227-70-8 MDL No.:

MF: MW:

Pricing and Availability

2,3-Dichloro-N,N-diphenylaniline

Catalog No.: AA020I8J

CAS No.:1284227-86-6 MDL No.:

MF: C18H13Cl2N MW: 314.2085

Pricing and Availability

2-[1-Amino-2-(4-fluorophenoxy)ethylidene]malononitrile

Catalog No.: AA01FHE4

CAS No.:1284228-23-4 MDL No.: MFCD00139200

MF: C11H8FN3O MW: 217.1991

Pricing and Availability

(+/-)-Trans-4-(3-chloro-phenyl)-pyrrolidine-3-carboxylic acid hydrochloride

Catalog No.: AA00HRQ7

CAS No.:1284228-59-6 MDL No.: MFCD06659261

MF: C11H13Cl2NO2 MW: 262.1324

Pricing and Availability

2,4-dibromo-4,4-difluorobutan-1-ol

Catalog No.: AA028V5W

CAS No.:1284229-18-0 MDL No.: MFCD00155738

MF: C4H6Br2F2O MW: 267.8946

Pricing and Availability

1-[4-(4-Chloro-but-2-ynyloxy)-phenyl]-ethanone

Catalog No.: AA01DV43

CAS No.:1284229-49-7 MDL No.: MFCD08447824

MF: C12H11ClO2 MW: 222.6675

Pricing and Availability

3-Amino-6-bromo-indolizine-2-carbonitrile

Catalog No.: AA01KIIK

CAS No.:1284237-34-8 MDL No.: MFCD30717654

MF: C9H6BrN3 MW: 236.0680

Pricing and Availability

3-amino-1-methylindolizine-2-carbonitrile

Catalog No.: AA01C13P

CAS No.:1284237-37-1 MDL No.: MFCD20727323

MF: C10H9N3 MW: 171.1986

Pricing and Availability

Benzene, 1,4-dibromo-2,5-bis(hexyloxy)-

Catalog No.: AA000Y04

CAS No.:128424-36-2 MDL No.: MFCD19687095

MF: C18H28Br2O2 MW: 436.2217

Pricing and Availability

Benzene, 1,4-diethynyl-2,5-bis(hexyloxy)-

Catalog No.: AA000Y03

CAS No.:128424-37-3 MDL No.: MFCD13186673

MF: C22H30O2 MW: 326.4724

Pricing and Availability

1H-Benz[e]indolium, 2-[3-[3-(5-carboxypentyl)-1,3-dihydro-1,1-dimethyl-6,8-disulfo-2H-benz[e]indol-2-ylidene]-1-propen-1-yl]-3-ethyl-1,1-dimethyl-6,8-disulfo-, inner salt

Catalog No.: AA000XZS

CAS No.:1284240-77-2 MDL No.: MFCD30470671

MF: C39H42N2O14S4 MW: 891.0158

Pricing and Availability

tert-Butyl 4-(4-fluorophenyl)-3-oxopiperazine-1-carboxylate

Catalog No.: AA000XZR

CAS No.:1284243-44-2 MDL No.: MFCD16620878

MF: C15H19FN2O3 MW: 294.3214

Pricing and Availability

tert-butyl 3-oxo-4-(pyridin-3-yl)piperazine-1-carboxylate

Catalog No.: AA025RVJ

CAS No.:1284243-57-7 MDL No.: MFCD28964459

MF: C14H19N3O3 MW: 277.3190

Pricing and Availability

1-(Tetrahydro-2h-pyran-4-yl)piperazin-2-one hydrochloride

Catalog No.: AA000XZQ

CAS No.:1284244-13-8 MDL No.: MFCD22581540

MF: C9H17ClN2O2 MW: 220.6965

Pricing and Availability

tert-Butyl (3-methylcyclobutyl)carbamate

Catalog No.: AA000XZP

CAS No.:1284245-14-2 MDL No.: MFCD22987611

MF: C10H19NO2 MW: 185.2634

Pricing and Availability

3-Fluorocyclobutanamine hydrochloride

Catalog No.: AA000XZO

CAS No.:1284245-36-8 MDL No.: MFCD21642364

MF: C4H9ClFN MW: 125.5724

Pricing and Availability

Catalog No.: AA021W32

CAS No.:1284245-62-0 MDL No.:

MF: MW:

Pricing and Availability

Ethyl (e)-3-(3-chlorophenyl)-4,4,4-trifluorobut-2-enoate

Catalog No.: AA00HRQ8

CAS No.:1284245-86-8 MDL No.: MFCD29078493

MF: MW:

Pricing and Availability

tert-butyl N-(3,3-dimethylcyclobutyl)carbamate

Catalog No.: AA021W4S

CAS No.:1284247-21-7 MDL No.:

MF: C11H21NO2 MW: 199.2899

Pricing and Availability

3,3-Dimethylcyclobutan-1-amine hydrochloride

Catalog No.: AA000XZN

CAS No.:1284247-23-9 MDL No.: MFCD22987614

MF: C6H14ClN MW: 135.6351

Pricing and Availability