Product Index

3-(4-Hydroxy-pyrazol-1-yl)-azetidine-1-carboxylic acid tert-butyl ester

Catalog No.: AA01SYXX

CAS No.:2270907-87-2 MDL No.: MFCD31583352

MF: C11H17N3O3 MW: 239.2710

Pricing and Availability

6-amino-1H-1,2,3-benzotriazol-1-ol

Catalog No.: AA01B1H3

CAS No.:1379344-26-9 MDL No.: MFCD20703911

MF: C6H6N4O MW: 150.1380

Pricing and Availability

5-(PIPERAZIN-1-YL)PYRIDINE-3-CARBOXYLIC ACID

Catalog No.: AA01BQ42

CAS No.:1507327-60-7 MDL No.: MFCD22085342

MF: C10H13N3O2 MW: 207.2291

Pricing and Availability

4-(piperazin-1-yl)pyridine-2-carboxylic acid

Catalog No.: AA01C4Q7

CAS No.:1291475-02-9 MDL No.: MFCD14695286

MF: C10H13N3O2 MW: 207.2291

Pricing and Availability

1-Phenyl-3-(pyrrolidin-1-yl)propan-1-one hydrochloride

Catalog No.: AA004VNB

CAS No.:833-86-3 MDL No.: MFCD00035233

MF: C13H18ClNO MW: 239.7411

Pricing and Availability

3-Ethyl-5-methylaniline

Catalog No.: AA01KK14

CAS No.:7544-53-8 MDL No.: MFCD19205345

MF: C9H13N MW: 135.2062

Pricing and Availability

1,2-dihydrospiro[indole-3,3'-oxolane]-2-one

Catalog No.: AA01BPEC

CAS No.:1160487-70-6 MDL No.: MFCD29977741

MF: C11H11NO2 MW: 189.2105

Pricing and Availability

D-Valine, N-methyl-, methyl ester, hydrochloride (1:1)

Catalog No.: AA000TBK

CAS No.:1268729-60-7 MDL No.: MFCD04973246

MF: C7H16ClNO2 MW: 181.6604

Pricing and Availability

5-?aminooxane-?3-?carboxylic acid

Catalog No.: AA01DXI9

CAS No.:1782547-02-7 MDL No.: MFCD30803027

MF: C6H11NO3 MW: 145.1564

Pricing and Availability

2,5-Dichloro-4-iodopyrimidine

Catalog No.: AA01UNED

CAS No.:1137576-41-0 MDL No.: MFCD18250122

MF: C4HCl2IN2 MW: 274.8746

Pricing and Availability

Methyl 2-chloro-3-methoxyisonicotinate

Catalog No.: AA009HL1

CAS No.:1214387-44-6 MDL No.: MFCD14698149

MF: C8H8ClNO3 MW: 201.6070

Pricing and Availability

2-[2-(5-CHLORO-1H-INDOL-2-YL)-ETHYL]-ISOINDOLE-1,3-DIONE

Catalog No.: AA004PEO

CAS No.:847203-42-3 MDL No.:

MF: C18H13ClN2O2 MW: 324.7610

Pricing and Availability

(1R,3R)-3-Aminomethyl-cyclopentanol

Catalog No.: AA01DML9

CAS No.:946826-76-2 MDL No.: MFCD11052501

MF: C6H13NO MW: 115.1735

Pricing and Availability

(S)-2-Amino-2,4-dimethylpentan-1-ol

Catalog No.: AA01FY43

CAS No.:1352447-28-9 MDL No.: MFCD20921824

MF: C7H17NO MW: 131.2160

Pricing and Availability

BENZOYLPUTRESCINE

Catalog No.: AA01I3DU

CAS No.:5692-23-9 MDL No.:

MF: C11H16N2O MW: 192.2575

Pricing and Availability

Cyanine5 amine

Catalog No.: AA01LQQ7

CAS No.:1807529-70-9 MDL No.:

MF: C38H54Cl2N4O MW: 653.7676

Pricing and Availability

Pyridine, 2-bromo-, hydrochloride

Catalog No.: AA01GX8M

CAS No.:65520-10-7 MDL No.:

MF: C5H5BrClN MW: 194.4569

Pricing and Availability

PMC-S-METHYLISOTHIOUREA

Catalog No.: AA00BAT9

CAS No.:185674-98-0 MDL No.: MFCD01318867

MF: C16H24N2O3S2 MW: 356.5034

Pricing and Availability

5,10,15,20-Tetrakis-(4-aminophenyl)-porphyrin-Cu-(II)

Catalog No.: AA00FYLL

CAS No.:67595-97-5 MDL No.: MFCD03453185

MF: C46H44CuN8 MW: 772.4412

Pricing and Availability

3-Iodo-5-methoxy-1-methyl-1h-indole

Catalog No.: AA00H96B

CAS No.:1005349-15-4 MDL No.: MFCD13177459

MF: C10H10INO MW: 287.0970

Pricing and Availability

2-(1H-imidazol-1-yl)ethyl methacrylate

Catalog No.: AA00EX1U

CAS No.:62037-81-4 MDL No.:

MF: C9H12N2O2 MW: 180.2038

Pricing and Availability

tert-butyl 9-oxo-6-azaspiro[3.5]nonane-6-carboxylate

Catalog No.: AA01DT80

CAS No.:1159982-50-9 MDL No.: MFCD11840371

MF: C13H21NO3 MW: 239.3107

Pricing and Availability

4-(difluoromethyl)piperidin-4-ol

Catalog No.: AA01A1TU

CAS No.:1423032-03-4 MDL No.: MFCD22421912

MF: C6H11F2NO MW: 151.1544

Pricing and Availability

Hexakis(1h,1h-perfluorooctyloxy)phosphazene

Catalog No.: AA00AKBG

CAS No.:186043-52-7 MDL No.: MFCD28955837

MF: C48H12F90N3O6P3 MW: 2529.4030

Pricing and Availability

5-bromo-4-methoxy-1,3-thiazole

Catalog No.: AA01FIEJ

CAS No.:2228818-64-0 MDL No.: MFCD31690372

MF: C4H4BrNOS MW: 194.0497

Pricing and Availability

2,2'-(Ethane-1,2-diylbis(methylazanediyl))diethanol

Catalog No.: AA001C7M

CAS No.:14037-83-3 MDL No.: MFCD30587288

MF: C8H20N2O2 MW: 176.2566

Pricing and Availability

Pyridine, 2-(1,3-dioxolan-2-yl)-4-methyl-5-nitro-

Catalog No.: AA000PDI

CAS No.:119694-70-1 MDL No.: MFCD22044955

MF: C9H10N2O4 MW: 210.1867

Pricing and Availability

METHYL (3S)-3-AMINO-3-(PYRIDIN-3-YL)PROPANOATE

Catalog No.: AA00AS7I

CAS No.:198959-53-4 MDL No.: MFCD09256692

MF: C9H12N2O2 MW: 180.2038

Pricing and Availability

(4-Methoxypyridin-2-yl)boronic acid

Catalog No.: AA00AAHO

CAS No.:1333505-99-9 MDL No.: MFCD11223185

MF: C6H8BNO3 MW: 152.9436

Pricing and Availability

4-Methyl-5-nitropicolinaldehyde

Catalog No.: AA00IAAP

CAS No.:5832-38-2 MDL No.: MFCD18262142

MF: C7H6N2O3 MW: 166.1341

Pricing and Availability

2-Thiazolamine, N,N,5-trimethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-

Catalog No.: AA01KBQT

CAS No.:2223055-47-6 MDL No.:

MF: C12H21BN2O2S MW: 268.1833

Pricing and Availability

tert-butyl (3-acetyl-7-methoxynaphthalen-1-yl)carbamate

Catalog No.: AA009IWI

CAS No.:1313488-13-9 MDL No.: MFCD24387308

MF: C18H21NO4 MW: 315.3636

Pricing and Availability

Trans-4-(aminomethyl)-1-methyl-cyclohexanol

Catalog No.: AA001TCQ

CAS No.:1628012-59-8 MDL No.: MFCD31925442

MF: C8H17NO MW: 143.2267

Pricing and Availability

2-[(2-phenylethyl)amino]acetic acid

Catalog No.: AA01ADLO

CAS No.:7738-38-7 MDL No.: MFCD20264891

MF: C10H13NO2 MW: 179.2157

Pricing and Availability

2-Isopropoxy-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine

Catalog No.: AA00HVO5

CAS No.:1401350-37-5 MDL No.: MFCD09607769

MF: C14H22BNO3 MW: 263.1404

Pricing and Availability

(1R)-1-(4-ISOPROPOXYPHENYL)ETHANAMINE

Catalog No.: AA009ZKU

CAS No.:1212128-58-9 MDL No.: MFCD08057422

MF: C11H17NO MW: 179.2588

Pricing and Availability

Boronic acid, B-[5-(aminocarbonyl)-2-pyridinyl]-

Catalog No.: AA000CC2

CAS No.:1164100-83-7 MDL No.: MFCD12964527

MF: C6H7BN2O3 MW: 165.9424

Pricing and Availability

((1R,2R)-2-AMINO-CYCLOHEXYL)-METHANOL

Catalog No.: AA00EK7T

CAS No.:5691-15-6 MDL No.: MFCD09834085

MF: C7H15NO MW: 129.2001

Pricing and Availability

(4-IODOPHENYL)METHANESULFONAMIDE

Catalog No.: AA01B34H

CAS No.:452340-78-2 MDL No.: MFCD21243149

MF: C7H8INO2S MW: 297.1134

Pricing and Availability

7-Thia-1-azaspiro[4.5]decane, 7,7-dioxide, hydrochloride (1:1)

Catalog No.: AA01KBNV

CAS No.:2243512-61-8 MDL No.: MFCD31668628

MF: C8H16ClNO2S MW: 225.7361

Pricing and Availability

(6-(Ethoxycarbonyl)pyridin-3-yl)boronic acid

Catalog No.: AA01JZD6

CAS No.:2022984-53-6 MDL No.:

MF: C8H10BNO4 MW: 194.9803

Pricing and Availability

5-bromo-1,2-thiazol-4-amine

Catalog No.: AA01B2CE

CAS No.:1955548-81-8 MDL No.: MFCD30180429

MF: C3H3BrN2S MW: 179.0383

Pricing and Availability

(3-Methylpyrrolidin-3-yl)MethanaMine

Catalog No.: AA008TR0

CAS No.:114373-07-8 MDL No.: MFCD18274549

MF: C6H14N2 MW: 114.1888

Pricing and Availability

3-(2-Methoxyphenyl)azetidine hydrochloride

Catalog No.: AA00HFD4

CAS No.:1203685-74-8 MDL No.: MFCD08460702

MF: C10H14ClNO MW: 199.6773

Pricing and Availability

METHYL 5-(AMINOMETHYL)-1,2-OXAZOLE-3-CARBOXYLATE

Catalog No.: AA01DSYQ

CAS No.:893749-60-5 MDL No.: MFCD06804390

MF: C6H8N2O3 MW: 156.1393

Pricing and Availability

1,3-bis(3-methylphenyl)urea

Catalog No.: AA01HZAQ

CAS No.:620-50-8 MDL No.: MFCD00446371

MF: C15H16N2O MW: 240.3003

Pricing and Availability

B-(6-propyl-3-pyridinyl)-Boronic acid

Catalog No.: AA00HF79

CAS No.:1201788-51-3 MDL No.: MFCD16038212

MF: C8H12BNO2 MW: 164.9974

Pricing and Availability

(9H-Fluoren-9-yl)methyl 4-((tert-butoxycarbonyl)amino)piperidine-1-carboxylate

Catalog No.: AA01K0RU

CAS No.:1935586-88-1 MDL No.:

MF: C25H30N2O4 MW: 422.5167

Pricing and Availability

2,5-Pyrrolidinedione, 1-(ethylthio)-

Catalog No.: AA0071A6

CAS No.:42839-22-5 MDL No.:

MF: C6H9NO2S MW: 159.2062

Pricing and Availability

7-[5-[(aminosulfonyl)amino]-5-deoxy-β-D-ribofuranosyl]-5-[2-(2-ethoxy-6-fluorophenyl)ethynyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

Catalog No.: AA01KBNU

CAS No.:1848959-10-3 MDL No.: MFCD32067967

MF: C21H23FN6O6S MW: 506.5073

Pricing and Availability

Methyl2-(bromomethyl)-5-(trifluoromethyl)nicotinate

Catalog No.: AA01KK3X

CAS No.:1260672-86-3 MDL No.: MFCD18251162

MF: C9H7BrF3NO2 MW: 298.0566

Pricing and Availability

(5-METHYL-1-PHENYL-1H-1,2,3-TRIAZOL-4-YL)METHANAMINE

Catalog No.: AA01C5UV

CAS No.:861558-88-5 MDL No.: MFCD11574698

MF: C10H12N4 MW: 188.2291

Pricing and Availability

(S)-2-(Cbz-amino)-3-(1-boc-piperidin-4-yl)propanoic acid

Catalog No.: AA00I0CE

CAS No.:1820583-71-8 MDL No.: MFCD27991361

MF: C21H30N2O6 MW: 406.4727

Pricing and Availability

3-(pyridin-2-yl)-3H-1,2,4-triazole-5-carboxylic acid

Catalog No.: AA01A0MG

CAS No.:1486465-50-2 MDL No.: MFCD22378769

MF: C8H6N4O2 MW: 190.1588

Pricing and Availability

Benzenamine, 4-methyl-2-(1-methylethyl)-

Catalog No.: AA01SS9T

CAS No.:5266-86-4 MDL No.:

MF: C10H15N MW: 149.2328

Pricing and Availability

4-(oxetan-2-yl)aniline

Catalog No.: AA01AHFN

CAS No.:1934426-97-7 MDL No.: MFCD30076182

MF: C9H11NO MW: 149.1897

Pricing and Availability

1,4-dioxepan-6-amine

Catalog No.: AA01AE5X

CAS No.:1048962-45-3 MDL No.: MFCD19207656

MF: C5H11NO2 MW: 117.1463

Pricing and Availability

methyl 6-bromo-5-methylH-pyrazolo[1,5-a]pyridine-3-carboxylate

Catalog No.: AA01JIIL

CAS No.:1345121-19-8 MDL No.:

MF: C10H9BrN2O2 MW: 269.0947

Pricing and Availability

(E)-4-Morpholinobut-2-enoic acid

Catalog No.: AA00AAI4

CAS No.:1323199-72-9 MDL No.: MFCD16662213

MF: C8H13NO3 MW: 171.1937

Pricing and Availability

(3S,4R)-4-Fluoropiperidin-3-ol hcl

Catalog No.: AA00I3T4

CAS No.:2055114-57-1 MDL No.: MFCD28502744

MF: C5H11ClFNO MW: 155.5983

Pricing and Availability

2-Oxa-6-azaadamantane hydrochloride

Catalog No.: AA01KC6O

CAS No.:35986-03-9 MDL No.: MFCD32012242

MF: C8H14ClNO MW: 175.6559

Pricing and Availability

2'-Deoxy-2'-iodouridine

Catalog No.: AA00DYV9

CAS No.:4753-03-1 MDL No.: MFCD28125329

MF: C9H11IN2O5 MW: 354.0985

Pricing and Availability

(1R,3S,5S)-Bicyclo[3.1.0]hexan-3-amine hcl

Catalog No.: AA00HRQ9

CAS No.:1284249-22-4 MDL No.: MFCD28501950

MF: C6H12ClN MW: 133.6192

Pricing and Availability

4,5-Dibromopyrimidine

Catalog No.: AA00184I

CAS No.:1381946-49-1 MDL No.: MFCD21748486

MF: C4H2Br2N2 MW: 237.8801

Pricing and Availability

5-[4-[[cis-4-(4,4-Difluoro-1-piperidinyl)cyclohexyl]amino]-6-quinazolinyl]-2-fluoro-3-pyridinol

Catalog No.: AA01KBHE

CAS No.:1899036-22-6 MDL No.:

MF: C24H26F3N5O MW: 457.4913

Pricing and Availability

5-[4-[[trans-4-(4,4-Difluoro-1-piperidinyl)cyclohexyl]amino]-6-quinazolinyl]-2-fluoro-3-pyridinol

Catalog No.: AA01KBHD

CAS No.:1899036-21-5 MDL No.:

MF: C24H26F3N5O MW: 457.4913

Pricing and Availability

L-Boc arginine methyl ester

Catalog No.: AA00GK62

CAS No.:83731-79-7 MDL No.: MFCD11656710

MF: C12H24N4O4 MW: 288.3434

Pricing and Availability

Ethyl 2-amino-6-(trifluoromethyl)benzoate

Catalog No.: AA01K1PM

CAS No.:1214366-70-7 MDL No.:

MF: C10H10F3NO2 MW: 233.1871

Pricing and Availability

(SP-4-1)-[1,3-Bis[2,6-bis(1-ethylpropyl)phenyl]-4,5-dichloro-1,3-dihydro-2H-imidazol-2-ylidene]dichloro(3-chloropyridine-κN)palladium

Catalog No.: AA01KEX2

CAS No.:1435347-24-2 MDL No.:

MF: C40H59Cl5N3Pd MW: 865.6016

Pricing and Availability

3,6-Diazabicyclo[3.1.1]heptane-6-carboxylic acid, 3-[(2-nitrophenyl)sulfonyl]-, 1,1-dimethylethyl ester

Catalog No.: AA01KBHF

CAS No.:1414540-41-2 MDL No.:

MF: C16H21N3O6S MW: 383.4194

Pricing and Availability

5-bromo-N3-methylpyridine-3,4-diamine

Catalog No.: AA01KBWK

CAS No.:1923301-32-9 MDL No.:

MF: C6H8BrN3 MW: 202.0518

Pricing and Availability

(R)-2-AMINO-3-BIPHENYL-3-YL-PROPIONIC ACID

Catalog No.: AA00AP7I

CAS No.:164172-95-6 MDL No.: MFCD07372094

MF: C15H15NO2 MW: 241.2851

Pricing and Availability

1,3-Difluoro-5-iodo-2-nitrobenzene

Catalog No.: AA001F53

CAS No.:147808-40-0 MDL No.: MFCD21607066

MF: C6H2F2INO2 MW: 284.9869

Pricing and Availability

cis-1,2-Cyclobutanedimethanamine dihydrochloride

Catalog No.: AA01KBNY

CAS No.:206991-53-9 MDL No.:

MF: C6H16Cl2N2 MW: 187.1106

Pricing and Availability

7-(Trifluoromethyl)-2,3-dihydroquinazolin-4(1H)-one

Catalog No.: AA01JIHF

CAS No.:2044704-73-4 MDL No.: MFCD30530507

MF: C9H7F3N2O MW: 216.1599

Pricing and Availability

4-Iodo-2-methoxy-5-methylpyridine

Catalog No.: AA000JC5

CAS No.:1227602-73-4 MDL No.: MFCD16611483

MF: C7H8INO MW: 249.0490

Pricing and Availability

Dexelvucitabine

Catalog No.: AA009HSX

CAS No.:134379-77-4 MDL No.: MFCD09954118

MF: C9H10FN3O3 MW: 227.1924

Pricing and Availability

Methyl 2-amino-2-cyclopentylacetate

Catalog No.: AA00GO0V

CAS No.:763078-53-1 MDL No.: MFCD13175032

MF: C8H15NO2 MW: 157.2102

Pricing and Availability

(S)-tert-Butyl 1-(5-bromopyridin-2-yl)-2-hydroxyethylcarbamate

Catalog No.: AA01KBM8

CAS No.:1454908-31-6 MDL No.:

MF: C12H17BrN2O3 MW: 317.1790

Pricing and Availability

6-AMINO-4-METHYLPYRIDIN-3-OL

Catalog No.: AA0097XZ

CAS No.:1033203-10-9 MDL No.: MFCD11100611

MF: C6H8N2O MW: 124.1405

Pricing and Availability

1H-Indole-2-ethanol, 1-methyl-

Catalog No.: AA01C98W

CAS No.:57666-13-4 MDL No.: MFCD13183844

MF: C11H13NO MW: 175.2270

Pricing and Availability

(2-Chloro-5-nitrophenyl)MethanaMine

Catalog No.: AA00DLGG

CAS No.:500590-13-6 MDL No.: MFCD03410975

MF: C7H7ClN2O2 MW: 186.5957

Pricing and Availability

5-Chloro-2-(methylthio)oxazolo[4,5-b]pyridine

Catalog No.: AA01KBY2

CAS No.:1783370-92-2 MDL No.: MFCD34169235

MF: C7H5ClN2OS MW: 200.6454

Pricing and Availability

tert-Butyl 4,8-diazaspiro[2.6]nonane-8-carboxylate

Catalog No.: AA00HEJZ

CAS No.:1186077-35-9 MDL No.: MFCD27992040

MF: C12H22N2O2 MW: 226.3153

Pricing and Availability

(benzhydrylideneamino) benzoate

Catalog No.: AA007DFQ

CAS No.:3362-33-2 MDL No.:

MF: C20H15NO2 MW: 301.3386

Pricing and Availability

1-AMINOADAMANTANE-N,N-D2

Catalog No.: AA00C5HW

CAS No.:40933-03-7 MDL No.: MFCD01861576

MF: C10H17N MW: 151.2487

Pricing and Availability

1,1'-ethylenedipiperazine

Catalog No.: AA00AZAZ

CAS No.:19479-83-5 MDL No.: MFCD00033735

MF: C10H22N4 MW: 198.3085

Pricing and Availability

3-Chloro-2-methyl-6-nitrobenzonitrile

Catalog No.: AA00DHWQ

CAS No.:51123-60-5 MDL No.: MFCD25964007

MF: C8H5ClN2O2 MW: 196.5905

Pricing and Availability

3-(Difluoromethoxy)-1H-pyrazole

Catalog No.: AA01UIHF

CAS No.:1799541-57-3 MDL No.: MFCD30802842

MF: C4H4F2N2O MW: 134.0842

Pricing and Availability

4-amino-5,6-dimethylthieno[2,3-d]pyrimidin-2(1H)-one

Catalog No.: AA009JU4

CAS No.:121746-18-7 MDL No.: MFCD20694613

MF: C8H9N3OS MW: 195.2416

Pricing and Availability

[1,2,4]Triazolo[4,3-a]pyridin-7-ol

Catalog No.: AA01TSKK

CAS No.:937263-36-0 MDL No.:

MF: C6H5N3O MW: 135.1234

Pricing and Availability

(3-methyl-3H-diazirin-3-yl)methanamine

Catalog No.: AA01AMNI

CAS No.:882568-97-0 MDL No.:

MF: C3H7N3 MW: 85.1078

Pricing and Availability

1H-Purin-2-amine, 6-phenoxy-

Catalog No.: AA007LQQ

CAS No.:134760-65-9 MDL No.:

MF: C11H9N5O MW: 227.2221

Pricing and Availability

1-Piperidinecarboxylic acid, 3-bromo-2,6-dioxo-, 1,1-dimethylethyl ester

Catalog No.: AA01KBPD

CAS No.:1558780-78-1 MDL No.:

MF: C10H14BrNO4 MW: 292.1265

Pricing and Availability

9-Oxa-1,4-diazaspiro[5.5]undecane (9CI)

Catalog No.: AA002ZUT

CAS No.:303802-17-7 MDL No.: MFCD18823224

MF: C8H16N2O MW: 156.2254

Pricing and Availability

4-aminooxane-2-carboxylic acid hydrochloride

Catalog No.: AA01FIAE

CAS No.:2228118-13-4 MDL No.: MFCD31666294

MF: C6H12ClNO3 MW: 181.6174

Pricing and Availability

2-Pyrimidinecarboxylic acid, 4-(aminomethyl)-, methyl ester

Catalog No.: AA01SN3Y

CAS No.:944902-00-5 MDL No.:

MF: C7H9N3O2 MW: 167.1653

Pricing and Availability

9H-Carbazol-3-amine, N,N-diphenyl-

Catalog No.: AA0047J8

CAS No.:883224-26-8 MDL No.: MFCD26403035

MF: C24H18N2 MW: 334.4131

Pricing and Availability

(S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(7-chloro-1H-indol-3-yl)propanoic acid

Catalog No.: AA01KYIB

CAS No.:1956436-89-7 MDL No.: MFCD30187630

MF: C31H29ClN2O6 MW: 561.0248

Pricing and Availability

2-(2-METHYLPROPYL)-1,3-OXAZOLE-4-CARBOXYLIC ACID

Catalog No.: AA01BSDY

CAS No.:1248373-18-3 MDL No.: MFCD16698577

MF: C8H11NO3 MW: 169.1778

Pricing and Availability