(2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid

C128H201N39O27S2 — CID 70687432

About (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid

(2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid (PubChem CID 70687432) has the molecular formula C128H201N39O27S2 and a molecular weight of 2782.40 g/mol. Its IUPAC name is (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid.

Molecular Properties

• Compound Name: (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid
• PubChem CID: 70687432
• Molecular Formula: C128H201N39O27S2
• Molecular Weight: 2782.40 g/mol
• Exact Mass: 2780.50
• IUPAC Name: (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid
• SMILES: [H]/N=C(\N)NCCC[C@@H]1NC(=O)[C@H](CCCN/C(N)=N/[H])NC(=O)[C@H](Cc2ccc(O)cc2)NC(=O)[C@@H]2CCCN2C(=O)[C@@H](CCCCN)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCCN/C(N)=N/[H])NC(=O)[C@H](Cc2ccc(O)cc2)NC(=O)[C@@H](NC(=O)[C@H](Cc2ccc3ccccc3c2)NC(=O)[C@H](CCCN/C(N)=N/[H])NC(=O)[C@@H](N)CCCN/C(N)=N/[H])CSSC[C@@H](C(=O)N[C@@H](CCCCNC(=O)[C@H](Cc2ccc(O)cc2)NC(=O)[C@H](CO)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CO)NC(=O)[C@@H](NC(=O)[C@@H]2CCCN2C(=O)[C@@H](N)CCCCN)C(C)C)C(=O)O)CC1=O
• InChI: InChI=1S/C128H201N39O27S2/c1-71(2)60-92(157-116(186)98(68-169)163-120(190)103(72(3)4)165-119(189)101-34-20-58-166(101)121(191)84(133)24-7-11-49-129)111(181)162-97(67-168)115(185)158-93(62-73-36-43-80(170)44-37-73)106(176)144-52-14-10-28-91(123(193)194)156-104(174)79-66-102(173)85(29-16-54-146-125(136)137)150-107(177)88(31-18-56-148-127(140)141)153-113(183)95(64-75-40-47-82(172)48-41-75)161-118(188)100-33-21-59-167(100)122(192)90(27-9-13-51-131)155-109(179)86(26-8-12-50-130)152-108(178)89(32-19-57-149-128(142)143)154-112(182)94(63-74-38-45-81(171)46-39-74)160-117(187)99(70-196-195-69-79)164-114(184)96(65-76-35-42-77-22-5-6-23-78(77)61-76)159-110(180)87(30-17-55-147-126(138)139)151-105(175)83(132)25-15-53-145-124(134)135/h5-6,22-23,35-48,61,71-72,79,83-101,103,168-172H,7-21,24-34,49-60,62-70,129-133H2,1-4H3,(H,144,176)(H,150,177)(H,151,175)(H,152,178)(H,153,183)(H,154,182)(H,155,179)(H,156,174)(H,157,186)(H,158,185)(H,159,180)(H,160,187)(H,161,188)(H,162,181)(H,163,190)(H,164,184)(H,165,189)(H,193,194)(H4,134,135,145)(H4,136,137,146)(H4,138,139,147)(H4,140,141,148)(H4,142,143,149)/t79-,83-,84-,85-,86-,87-,88-,89-,90+,91-,92-,93-,94-,95-,96-,97-,98-,99-,100-,101-,103-/m0/s1
• InChIKey: SSNYRJQFQDHXEN-XZAMJADMSA-N
• XLogP: -6.65
• TPSA: 1130.44 Ų
• H-Bond Donors: 43
• H-Bond Acceptors: 38
• Rotatable Bonds: 71
• Heavy Atoms: 196
• Complexity: —

Lipinski Rule of Five

3 violations

Rule	Value
MW ≤ 500	2782.40
LogP ≤ 5	-6.65
H-Bond Donors ≤ 5	43
H-Bond Acceptors ≤ 10	38

Computed Properties (RDKit)

• Structural Alerts: {'alert_name': 'Aliphatic_long_chain', 'substructure': 'N/A'}, {'alert_name': 'disulphide', 'substructure': 'N/A'}, {'alert_name': 'imine_1', 'substructure': 'N/A'}, {'alert_name': 'imine_2', 'substructure': 'N/A'}

Frequently Asked Questions

What is the IUPAC name of (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid?

The IUPAC name of (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid (CID 70687432) is (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid.

What is the SMILES notation for (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid?

The canonical SMILES for (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid is [H]/N=C(\N)NCCC[C@@H]1NC(=O)[C@H](CCCN/C(N)=N/[H])NC(=O)[C@H](Cc2ccc(O)cc2)NC(=O)[C@@H]2CCCN2C(=O)[C@@H](CCCCN)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCCN/C(N)=N/[H])NC(=O)[C@H](Cc2ccc(O)cc2)NC(=O)[C@@H](NC(=O)[C@H](Cc2ccc3ccccc3c2)NC(=O)[C@H](CCCN/C(N)=N/[H])NC(=O)[C@@H](N)CCCN/C(N)=N/[H])CSSC[C@@H](C(=O)N[C@@H](CCCCNC(=O)[C@H](Cc2ccc(O)cc2)NC(=O)[C@H](CO)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CO)NC(=O)[C@@H](NC(=O)[C@@H]2CCCN2C(=O)[C@@H](N)CCCCN)C(C)C)C(=O)O)CC1=O.

What is the InChIKey of (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid?

The InChIKey is SSNYRJQFQDHXEN-XZAMJADMSA-N. The full InChI is InChI=1S/C128H201N39O27S2/c1-71(2)60-92(157-116(186)98(68-169)163-120(190)103(72(3)4)165-119(189)101-34-20-58-166(101)121(191)84(133)24-7-11-49-129)111(181)162-97(67-168)115(185)158-93(62-73-36-43-80(170)44-37-73)106(176)144-52-14-10-28-91(123(193)194)156-104(174)79-66-102(173)85(29-16-54-146-125(136)137)150-107(177)88(31-18-56-148-127(140)141)153-113(183)95(64-75-40-47-82(172)48-41-75)161-118(188)100-33-21-59-167(100)122(192)90(27-9-13-51-131)155-109(179)86(26-8-12-50-130)152-108(178)89(32-19-57-149-128(142)143)154-112(182)94(63-74-38-45-81(171)46-39-74)160-117(187)99(70-196-195-69-79)164-114(184)96(65-76-35-42-77-22-5-6-23-78(77)61-76)159-110(180)87(30-17-55-147-126(138)139)151-105(175)83(132)25-15-53-145-124(134)135/h5-6,22-23,35-48,61,71-72,79,83-101,103,168-172H,7-21,24-34,49-60,62-70,129-133H2,1-4H3,(H,144,176)(H,150,177)(H,151,175)(H,152,178)(H,153,183)(H,154,182)(H,155,179)(H,156,174)(H,157,186)(H,158,185)(H,159,180)(H,160,187)(H,161,188)(H,162,181)(H,163,190)(H,164,184)(H,165,189)(H,193,194)(H4,134,135,145)(H4,136,137,146)(H4,138,139,147)(H4,140,141,148)(H4,142,143,149)/t79-,83-,84-,85-,86-,87-,88-,89-,90+,91-,92-,93-,94-,95-,96-,97-,98-,99-,100-,101-,103-/m0/s1.

What are the key properties of (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid?

(2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid has a molecular weight of 2782.40 g/mol, XLogP of -6.65, 71 rotatable bonds, 43 hydrogen bond donors, and 38 hydrogen bond acceptors.

Where does this data come from?

All data for (2S)-2-[[(3R,6S,9S,12S,15R,20R,23S,26S,29S,32S)-3,6-bis(4-aminobutyl)-15-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-3-naphthalen-2-ylpropanoyl]amino]-9,23,26-tris(3-carbamimidamidopropyl)-12,29-bis[(4-hydroxyphenyl)methyl]-2,5,8,11,14,22,25,28,31-nonaoxo-17,18-dithia-1,4,7,10,13,24,27,30-octazabicyclo[30.3.0]pentatriacontane-20-carbonyl]amino]-6-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidine-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoic acid is sourced from PubChem (CID 70687432), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).