Product Index

Bicyclo[1.1.1]pentane-1-carboxylic acid, 3-(acetylthio)-, methyl ester

Catalog No.: AA01OS23

CAS No.:131543-52-7 MDL No.: MFCD31705890

MF: C9H12O3S MW: 200.2548

Pricing and Availability

Carbamic acid,N,N'-(methylenedi-4,1-phenylene)bis-, C,C'-diethyl ester

Catalog No.: AA007FO0

CAS No.:10097-16-2 MDL No.: MFCD00026812

MF: C19H22N2O4 MW: 342.3890

Pricing and Availability

1,2-Propanedione, 1-(3-methoxyphenyl)-

Catalog No.: AA01OXCL

CAS No.:10557-22-9 MDL No.:

MF: C10H10O3 MW: 178.1846

Pricing and Availability

2-(3,3,5,5-Tetramethylpiperidin-1-yl)acetonitrile

Catalog No.: AA01WTM6

CAS No.:1863522-17-1 MDL No.: MFCD30097302

MF: C11H20N2 MW: 180.2899

Pricing and Availability

(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(4-(pyridin-2-yl)phenyl)propanoic acid

Catalog No.: AA01WTMF

CAS No.:352525-26-9 MDL No.:

MF: C29H24N2O4 MW: 464.5119

Pricing and Availability

Cyclobutanemethanamine, α-ethenyl-, hydrochloride (1:1)

Catalog No.: AA01WTM7

CAS No.:2416231-83-7 MDL No.: MFCD32668655

MF: C7H14ClN MW: 147.6458

Pricing and Availability

(αS)-α-[[(9H-Fluoren-9-ylmethoxy)carbonyl]amino]-4-pyrimidinepropanoic acid

Catalog No.: AA01WTMH

CAS No.:1251903-94-2 MDL No.:

MF: C22H19N3O4 MW: 389.4040

Pricing and Availability

7-Quinolinepropanoic acid, α-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-, (αS)-

Catalog No.: AA01WTMI

CAS No.:2349649-45-0 MDL No.:

MF: C27H22N2O4 MW: 438.4746

Pricing and Availability

N-[1,1′-Biphenyl]-3-yl-3-dibenzothiophenamine

Catalog No.: AA01WU2D

CAS No.:1923735-65-2 MDL No.:

MF: C24H17NS MW: 351.4635

Pricing and Availability

N-Fmoc-3-hydroxy-D-phenylalanine

Catalog No.: AA01JK8D

CAS No.:1217724-28-1 MDL No.: MFCD07371960

MF: C24H21NO5 MW: 403.4272

Pricing and Availability

3-Isocyanatopropanoylchloride

Catalog No.: AA00CYUU

CAS No.:3729-19-9 MDL No.: MFCD19300800

MF: C4H4ClNO2 MW: 133.5331

Pricing and Availability

2-?chloro-?5H-?pyrrolo[3,?2-?d]?pyrimidine-?6-?carboxylic acid

Catalog No.: AA01DXLO

CAS No.:1935150-77-8 MDL No.: MFCD29761792

MF: C7H4ClN3O2 MW: 197.5786

Pricing and Availability

4-PIPERAZIN-2-YL-BENZONITRILE

Catalog No.: AA00FCHW

CAS No.:65709-35-5 MDL No.: MFCD04038580

MF: C11H13N3 MW: 187.2410

Pricing and Availability

2(1H)-Pyridinone, 4-ethyl-

Catalog No.: AA01HJBT

CAS No.:37529-91-2 MDL No.:

MF: C7H9NO MW: 123.1525

Pricing and Availability

L-Alanine, N-(1-oxodecyl)-

Catalog No.: AA007UQA

CAS No.:110538-83-5 MDL No.: MFCD16376130

MF: C13H25NO3 MW: 243.3425

Pricing and Availability

5-Oxa-2-azaspiro[3.4]octan-7-onehydrochloride

Catalog No.: AA01M38Q

CAS No.:2306271-65-6 MDL No.: MFCD31743096

MF: C6H10ClNO2 MW: 163.6021

Pricing and Availability

methyl 4-amino-3,5-dimethoxybenzoate

Catalog No.: AA01LD8X

CAS No.:56066-25-2 MDL No.:

MF: C10H13NO4 MW: 211.2145

Pricing and Availability

(αS)-α-[[(9H-Fluoren-9-ylmethoxy)carbonyl]amino]-1-methyl-1H-pyrrolo[2,3-b]pyridine-3-propanoic acid

Catalog No.: AA01WTWZ

CAS No.:1813528-10-7 MDL No.:

MF: C26H23N3O4 MW: 441.4785

Pricing and Availability

[3-(2-Methoxyphenyl)oxetan-3-yl]methanamine

Catalog No.: AA00HXTN

CAS No.:1516599-98-6 MDL No.: MFCD26695816

MF: C11H15NO2 MW: 193.2423

Pricing and Availability

2-Propenoic acid, 2-(2-phenoxyethoxy)ethyl ester

Catalog No.: AA01WUAO

CAS No.:61630-25-9 MDL No.:

MF: C13H16O4 MW: 236.2637

Pricing and Availability

5-methylquinolin-2(1H)-one

Catalog No.: AA00CKH3

CAS No.:4053-33-2 MDL No.: MFCD18836755

MF: C10H9NO MW: 159.1846

Pricing and Availability

Propanedioic acid, (2E)-2-butenyl-, dimethyl ester

Catalog No.: AA004Z3A

CAS No.:82545-71-9 MDL No.:

MF: C9H14O4 MW: 186.2051

Pricing and Availability

tert-butyl 3-[(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)methylene]pyrrolidine-1-carboxylate

Catalog No.: AA01WTR6

CAS No.:2376764-71-3 MDL No.: MFCD30527676

MF: C16H28BNO4 MW: 309.2088

Pricing and Availability

1-(OXETAN-3-YL)-1-PHENYLMETHANAMINE

Catalog No.: AA01WUAQ

CAS No.:2383987-27-5 MDL No.:

MF: C10H13NO MW: 163.2163

Pricing and Availability

2(3H)-FURANONE,5-ETHYLDIHYDRO

Catalog No.: AA00BT0P

CAS No.:2865-82-9 MDL No.: MFCD32679322

MF: C7H12O2 MW: 128.1690

Pricing and Availability

2(1H)-Quinolinone, 5-(bromomethyl)-

Catalog No.: AA00L67K

CAS No.:103702-28-9 MDL No.:

MF: C10H8BrNO MW: 238.0806

Pricing and Availability

5-Bromo-7-methyl-1,3-benzoxazol-2-amine

Catalog No.: AA00HRI1

CAS No.:1268110-58-2 MDL No.: MFCD18294017

MF: C8H7BrN2O MW: 227.0580

Pricing and Availability

Benzamide, N-(6-bromo-2,3,4,9-tetrahydro-1H-carbazol-1-yl)-

Catalog No.: AA00573P

CAS No.:827590-44-3 MDL No.: MFCD28128113

MF: C19H17BrN2O MW: 369.2551

Pricing and Availability

6-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)piperidin-1-yl]pyridine-3-carboxylic acid

Catalog No.: AA01BJHI

CAS No.:2092143-48-9 MDL No.: MFCD31421653

MF: C26H25N3O4 MW: 443.4944

Pricing and Availability

tert-butyl N-(5-bromo-1-methyl-1H-pyrazol-4-yl)carbamate

Catalog No.: AA00TDAJ

CAS No.:2109725-25-7 MDL No.: MFCD32668263

MF: C9H14BrN3O2 MW: 276.1304

Pricing and Availability

OT-82

Catalog No.: AA01V41H

CAS No.:1800487-55-1 MDL No.:

MF: C26H21FN4O MW: 424.4695

Pricing and Availability

2-Dibenzofuranol, 7-chloro-

Catalog No.: AA005YW6

CAS No.:73518-07-7 MDL No.: MFCD24713946

MF: C12H7ClO2 MW: 218.6358

Pricing and Availability

1-ETHYL-4-ISO-PROPYLBENZENE

Catalog No.: AA00C66E

CAS No.:4218-48-8 MDL No.: MFCD00061006

MF: C11H16 MW: 148.2447

Pricing and Availability

2-Pyrimidinol, 4-amino- (9CI)

Catalog No.: AA00FXP1

CAS No.:66460-21-7 MDL No.: MFCD00082220

MF: C4H5N3O MW: 111.1020

Pricing and Availability

5-Oxazolidinemethanol, 3-(1,1-dimethylethyl)-2-phenyl-

Catalog No.: AA002ZLU

CAS No.:30315-49-2 MDL No.: MFCD00618541

MF: C14H21NO2 MW: 235.3220

Pricing and Availability

Levomepromazine hydrochloride

Catalog No.: AA009A7M

CAS No.:1236-99-3 MDL No.: MFCD25977765

MF: C19H25ClN2OS MW: 364.9326

Pricing and Availability

2-Amino-8-chloropyrido[3,4-d]pyrimidin-4(3h)-one

Catalog No.: AA00HVX0

CAS No.:1413424-77-7 MDL No.: MFCD28134040

MF: C7H5ClN4O MW: 196.5938

Pricing and Availability

2-(cyclohexylmethoxy)benzoic acid

Catalog No.: AA00CSDC

CAS No.:339539-11-6 MDL No.: MFCD11127470

MF: C14H18O3 MW: 234.2909

Pricing and Availability

N1-PROPAN-2-YL-N2-PROPYL-ETHANEDIHYDRAZIDE

Catalog No.: AA01J9OZ

CAS No.:92402-25-0 MDL No.:

MF: C8H18N4O2 MW: 202.2541

Pricing and Availability

4,6-dichloro-5-methyl-2-(trifluoromethyl)Pyrimidine

Catalog No.: AA00G910

CAS No.:852062-35-2 MDL No.: MFCD22398000

MF: C6H3Cl2F3N2 MW: 231.0026

Pricing and Availability

5-Iodo-2-methylnicotinonitrile

Catalog No.: AA01K1K8

CAS No.:1346533-56-9 MDL No.: MFCD28776649

MF: C7H5IN2 MW: 244.0325

Pricing and Availability

2-Methyl-4-(pyrrolidin-2-yl)pyrimidine

Catalog No.: AA007UVT

CAS No.:1063734-73-5 MDL No.: MFCD16093622

MF: C9H13N3 MW: 163.2196

Pricing and Availability

2-Butyne, 1-bromo-4-methoxy-

Catalog No.: AA005NOD

CAS No.:693-26-5 MDL No.: MFCD20621317

MF: C5H7BrO MW: 163.0125

Pricing and Availability

3-fluoro-5-nitro-1H-pyrazole

Catalog No.: AA01DXN7

CAS No.:73305-88-1 MDL No.: MFCD29762426

MF: C3H2FN3O2 MW: 131.0653

Pricing and Availability

2-Furancarbonyl chloride, 3-chloro- (9CI)

Catalog No.: AA00FQOQ

CAS No.:66144-46-5 MDL No.: MFCD13173712

MF: C5H2Cl2O2 MW: 164.9742

Pricing and Availability

6-amino-9-[3,4-dihydroxy-5-[(hydroxy-sulfooxy-phosphoryl)oxymethyl]oxolan-2-yl]-purine

Catalog No.: AA00DMU3

CAS No.:485-84-7 MDL No.: MFCD00871482

MF: C10H14N5O10PS MW: 427.2844

Pricing and Availability

(R)-tert-Butyl2-(2-methoxy-2-oxoethyl)piperazine-1-carboxylate

Catalog No.: AA01V6O2

CAS No.:1638744-04-3 MDL No.:

MF: C12H22N2O4 MW: 258.3141

Pricing and Availability

3,4-dihydro-2h-1lambda6,2,4-benzothiadiazine-1,1-dione

Catalog No.: AA00CUOM

CAS No.:359-84-2 MDL No.: MFCD01663199

MF: C7H8N2O2S MW: 184.2156

Pricing and Availability

(S)-2-Cyclohexyl-2-(2,2,2-trifluoroacetamido)acetic acid

Catalog No.: AA01WU5C

CAS No.:2679832-44-9 MDL No.:

MF: C10H14F3NO3 MW: 253.2183

Pricing and Availability

2-cyclobutyl-1H-1,3-benzodiazol-5-amine

Catalog No.: AA01ADDQ

CAS No.:1016858-66-4 MDL No.: MFCD09944660

MF: C11H13N3 MW: 187.2410

Pricing and Availability

Methyl 1,4,5,6-tetrahydropyrazine-2-carboxylate

Catalog No.: AA00ALJE

CAS No.:171504-79-3 MDL No.: MFCD19218736

MF: C6H10N2O2 MW: 142.1558

Pricing and Availability

Ethyl 1,4,5,6-tetrahydropyrazine-2-carboxylate

Catalog No.: AA00CFS7

CAS No.:209592-04-1 MDL No.: MFCD13174982

MF: C7H12N2O2 MW: 156.1824

Pricing and Availability

2,2′-Bipyridine, 5,5′-diethyl-

Catalog No.: AA01PZ16

CAS No.:1762-43-2 MDL No.:

MF: C14H16N2 MW: 212.2902

Pricing and Availability

HaloperidolUndecanoate

Catalog No.: AA01E376

CAS No.:1797983-18-6 MDL No.:

MF: C32H43ClFNO3 MW: 544.1401

Pricing and Availability

heptanedioic acid, bis(2-ethylhexyl) ester

Catalog No.: AA00FR4W

CAS No.:72630-12-7 MDL No.:

MF: C23H44O4 MW: 384.5931

Pricing and Availability

2,7-Dimethoxy-1,4-naphthoquinone

Catalog No.: AA01HYM9

CAS No.:6223-34-3 MDL No.:

MF: C22H19N3O MW: 341.4058

Pricing and Availability

Ethanone, 1-[4-[3-(acetyloxy)propyl]phenyl]-

Catalog No.: AA01GJED

CAS No.:58810-86-9 MDL No.:

MF: C13H16O3 MW: 220.2643

Pricing and Availability

5-Cyclohexyl-1H-pyrazole

Catalog No.: AA01EWIY

CAS No.:60061-66-7 MDL No.: MFCD28401451

MF: C9H14N2 MW: 150.2209

Pricing and Availability

1-(4-Aminophenyl)-3-(Boc-amino)piperidine

Catalog No.: AA01JL99

CAS No.:889948-89-4 MDL No.: MFCD06657401

MF: C16H25N3O2 MW: 291.3886

Pricing and Availability

3-Fluoro-4-isothiocyanato-2-(trifluoromethyl)benzonitrile

Catalog No.: AA01WU4C

CAS No.:1311158-94-7 MDL No.: MFCD31652698

MF: C9H2F4N2S MW: 246.1842

Pricing and Availability

5'-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-spiro[cyclopropane-1,3'-[3h]indol]-2'(1'h)-one

Catalog No.: AA00HYL8

CAS No.:1613639-40-9 MDL No.: MFCD28501550

MF: C16H20BNO3 MW: 285.1459

Pricing and Availability

3-BUTYL-1-HEPTANOL

Catalog No.: AA00D9J3

CAS No.:51655-56-2 MDL No.: MFCD02258490

MF: C11H24O MW: 172.3077

Pricing and Availability

8-Nonenoic acid, 5-oxo-

Catalog No.: AA007ITE

CAS No.:32764-92-4 MDL No.:

MF: C9H14O3 MW: 170.2057

Pricing and Availability

Imidazo[1,2-a]pyrimidin-2-amine, 6-bromo-

Catalog No.: AA01SEY1

CAS No.:1103861-39-7 MDL No.:

MF: C6H5BrN4 MW: 213.0347

Pricing and Availability

MEBEVERINE

Catalog No.: AA00BXQJ

CAS No.:3625-06-7 MDL No.: MFCD00867721

MF: C25H35NO5 MW: 429.5491

Pricing and Availability

1-(3-BROMOPROPYL)-2,4-DICHLOROBENZENE

Catalog No.: AA00H71R

CAS No.:93962-66-4 MDL No.: MFCD12024969

MF: C9H9BrCl2 MW: 267.9778

Pricing and Availability

2,4-dinitro-6-pentan-2-yl-phenol

Catalog No.: AA00CVHA

CAS No.:4097-36-3 MDL No.: MFCD01741578

MF: C11H14N2O5 MW: 254.2393

Pricing and Availability

D-Phenylalanine, N-[(9H-fluoren-9-ylmethoxy)carbonyl]-β-methyl-, (βS)-

Catalog No.: AA01PH5M

CAS No.:321524-82-7 MDL No.:

MF: C25H23NO4 MW: 401.4544

Pricing and Availability

3-methylcyclopentan-1-amine

Catalog No.: AA01AE48

CAS No.:52430-83-8 MDL No.: MFCD19203566

MF: C6H13N MW: 99.1741

Pricing and Availability

Pyridine, 4-(1H-1,2,3-triazol-4-yl)- (9CI)

Catalog No.: AA00CKTH

CAS No.:369363-76-8 MDL No.: MFCD18968783

MF: C7H6N4 MW: 146.1493

Pricing and Availability

9-(2,3-Dihydroxypropoxy)-9-oxononanoic acid

Catalog No.: AA01WUAP

CAS No.:109421-77-4 MDL No.:

MF: C12H22O6 MW: 262.2995

Pricing and Availability

4-Piperidinepropanoic acid, 1-[2-(1,1-dimethylethoxy)-2-oxoethyl]-α-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-, (αS)-

Catalog No.: AA01WU2C

CAS No.:2680607-35-4 MDL No.:

MF: C29H36N2O6 MW: 508.6059

Pricing and Availability

3-Phenyl-8-Azabicyclo[3.2.1]Octan-3-Ol

Catalog No.: AA01WU2H

CAS No.:1824139-62-9 MDL No.: MFCD22384643

MF: C8H3BrF4O MW: 271.0064

Pricing and Availability

1,2,3-Benzothiadiazole-7-carboxylic acid, 2,2,2-trifluoroethyl ester

Catalog No.: AA004R3J

CAS No.:864237-81-0 MDL No.: MFCD28953043

MF: C9H5F3N2O2S MW: 262.2084

Pricing and Availability

benzyl (2R)-2-aminopropanoate

Catalog No.: AA019ZNO

CAS No.:17831-02-6 MDL No.: MFCD07357275

MF: C10H13NO2 MW: 179.2157

Pricing and Availability

2-(piperazin-1-ylmethyl)-1,3-benzothiazole

Catalog No.: AA019JVJ

CAS No.:232263-03-5 MDL No.: MFCD05664952

MF: C12H15N3S MW: 233.3326

Pricing and Availability

(3-Bromo-4-chlorophenyl)hydrazine

Catalog No.: AA01BKCH

CAS No.:344248-15-3 MDL No.: MFCD22565258

MF: C6H6BrClN2 MW: 221.4822

Pricing and Availability

N-OxoPrucalopride

Catalog No.: AA01E3G1

CAS No.:1900715-98-1 MDL No.:

MF: C9H13D5O4 MW: 195.2676

Pricing and Availability

3H-Imidazo[4,5-b]pyridine, 6-bromo-2-chloro-

Catalog No.: AA01Q6HF

CAS No.:438190-89-7 MDL No.:

MF: C6H3BrClN3 MW: 232.4651

Pricing and Availability

Pyridine, 3-(1-methyl-2-piperidinyl)-

Catalog No.: AA002ANR

CAS No.:2055-12-1 MDL No.:

MF: C11H16N2 MW: 176.2581

Pricing and Availability

Ethyl 3-(2,3-dihydrobenzo[b][1,4]dioxin-5-yl)-3-oxopropanoate

Catalog No.: AA01T3F5

CAS No.:1435402-60-0 MDL No.: MFCD31916203

MF: C13H14O5 MW: 250.2473

Pricing and Availability

Benzofuro[3,2-c]pyridin-1(2H)-one

Catalog No.: AA01PQ9I

CAS No.:26956-45-6 MDL No.:

MF: C11H7NO2 MW: 185.1788

Pricing and Availability

3-Azaspiro[5.5]undecan-9-one, 3-methyl-

Catalog No.: AA002HXP

CAS No.:189176-31-6 MDL No.: MFCD17013073

MF: C11H19NO MW: 181.2747

Pricing and Availability

2,4-DICHLORO-1-(3-CHLOROPROPYL)BENZENE

Catalog No.: AA005GUG

CAS No.:72506-10-6 MDL No.: MFCD12024970

MF: C9H9Cl3 MW: 223.5268

Pricing and Availability

(4-Cyclobutoxypyridin-2-yl)methanamine

Catalog No.: AA01ABPQ

CAS No.:1250948-64-1 MDL No.: MFCD16704087

MF: C10H14N2O MW: 178.2310

Pricing and Availability

4-(2-Aminoethyl)phenylboronic Acid

Catalog No.: AA01WUAM

CAS No.:68162-46-9 MDL No.: MFCD06212996

MF: C8H12BNO2 MW: 164.9974

Pricing and Availability

(2-Bromo-1,4-phenylene)dimethanol

Catalog No.: AA01V59N

CAS No.:89980-92-7 MDL No.: MFCD25968595

MF: C8H9BrO2 MW: 217.0599

Pricing and Availability

4-Chloro-3-Methyl-5-nitro-pyridine

Catalog No.: AA01WK9H

CAS No.:856834-51-0 MDL No.: MFCD28368535

MF: C6H5ClN2O2 MW: 172.5691

Pricing and Availability

1,1,2,2-Tetrakis(4-(pyridin-3-yl)phenyl)ethene

Catalog No.: AA01WKVU

CAS No.:1287777-24-5 MDL No.:

MF: C46H32N4 MW: 640.7731

Pricing and Availability

4',4''',4''''',4'''''''-(Ethene-1,1,2,2-tetrayl)tetrakis(([1,1'-biphenyl]-4-carbonitrile))

Catalog No.: AA01WSXV

CAS No.:608129-43-7 MDL No.:

MF: C54H32N4 MW: 736.8587

Pricing and Availability

Methyl-pyrrolidin-3-yl-carbamic acid benzyl ester

Catalog No.: AA01WSP1

CAS No.:1292370-03-6 MDL No.: MFCD08061958

MF: C13H18N2O2 MW: 234.2942

Pricing and Availability

1-(4-Chloro-6-methylpyrimidin-2-yl)piperidine-3-carboxylic acid

Catalog No.: AA01WSJ0

CAS No.:1264036-29-4 MDL No.: MFCD18380373

MF: C11H14ClN3O2 MW: 255.7008

Pricing and Availability

[2-(Methylsulfonyl)-4-nitrophenyl]-DL-proline

Catalog No.: AA01WTZP

CAS No.:1452572-57-4 MDL No.: MFCD08692417

MF: C12H14N2O6S MW: 314.3144

Pricing and Availability

[2-Chloro-5-methyl-4-(methylsulfonyl)phenyl]-DL-proline

Catalog No.: AA01WT9E

CAS No.:1188371-30-3 MDL No.: MFCD09027743

MF: C13H16ClNO4S MW: 317.7884

Pricing and Availability

1,3-Dichloro-2-(1,1-difluoroethyl)-4-fluorobenzene

Catalog No.: AA01MRH7

CAS No.:1138444-99-1 MDL No.: MFCD11845804

MF: C8H5Cl2F3 MW: 229.0265

Pricing and Availability

5-(2-Bromo-4-methylphenyl)-1H-tetrazole

Catalog No.: AA01WKUT

CAS No.:1252046-09-5 MDL No.: MFCD09025666

MF: C8H7BrN4 MW: 239.0720

Pricing and Availability

2-Bromo-4-[chloro(difluoro)methoxy]-1-fluoro-benzene

Catalog No.: AA01WSVN

CAS No.:1417568-36-5 MDL No.: MFCD22580841

MF: C7H3BrClF3O MW: 275.4503

Pricing and Availability

1-Bromo-2-[chloro(difluoro)methoxy]-5-fluoro-4-nitro-benzene

Catalog No.: AA01WSVR

CAS No.:1417566-56-3 MDL No.: MFCD22580910

MF: C7H2BrClF3NO3 MW: 320.4479

Pricing and Availability

2-(3-Nitrobenzoyl)oxazole

Catalog No.: AA01WKAA

CAS No.:1017060-79-5 MDL No.: MFCD07782995

MF: C10H6N2O4 MW: 218.1656

Pricing and Availability

2'-Acetoxy-5-chlorovalerophenone

Catalog No.: AA01WU4S

CAS No.:1017060-87-5 MDL No.: MFCD07783644

MF: C13H15ClO3 MW: 254.7094

Pricing and Availability