(6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide

C85H135ClN22O21S2 — CID 127034809

IUPAC(6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide
SMILESCSCC[C@H](NC(=O)CNC(=O)C(Cc1ccccc1Cl)NC(=O)[C@@H](NC(=O)[C@@H](NC(C)=O)[C@@H](C)O)[C@@H](C)O)C(=O)N[C@@H](CCSC)C(=O)N[C@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCCN)C(=O)N[C@H]1CCCCn2cc(nn2)C[C@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CO)C(N)=O)NC(=O)[C@H](CCCCN)NC(=O)[C@H](Cc2ccccc2)NC(=O)[C@H](C)NC1=O)[C@@H](C)O
InChIInChI=1S/C85H135ClN22O21S2/c1-45(2)37-61(80(124)103-66(44-109)71(89)115)99-82(126)65-41-54-43-108(107-106-54)34-22-19-29-56(74(118)91-47(5)72(116)98-63(39-52-23-13-12-14-24-52)81(125)96-58(76(120)100-65)28-18-21-33-88)94-75(119)57(27-17-20-32-87)95-79(123)62(38-46(3)4)101-83(127)69(49(7)111)104-78(122)60(31-36-131-11)97-77(121)59(30-35-130-10)93-67(114)42-90-73(117)64(40-53-25-15-16-26-55(53)86)102-84(128)70(50(8)112)105-85(129)68(48(6)110)92-51(9)113/h12-16,23-26,43,45-50,56-66,68-70,109-112H,17-22,27-42,44,87-88H2,1-11H3,(H2,89,115)(H,90,117)(H,91,118)(H,92,113)(H,93,114)(H,94,119)(H,95,123)(H,96,125)(H,97,121)(H,98,116)(H,99,126)(H,100,120)(H,101,127)(H,102,128)(H,103,124)(H,104,122)(H,105,129)/t47-,48+,49+,50+,56-,57-,58-,59-,60-,61-,62-,63-,64?,65+,66-,68-,69-,70-/m0/s1
InChIKeyIMALDMTYLCUSBN-ITINEMRRSA-N
MW1900.73 g/mol
LogP-4.95
Rot. Bonds50

About (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide

(6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide (PubChem CID 127034809) has the molecular formula C85H135ClN22O21S2 and a molecular weight of 1900.73 g/mol. Its IUPAC name is (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide.

Molecular Properties

Compound Name(6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide
PubChem CID127034809
Molecular FormulaC85H135ClN22O21S2
Molecular Weight1900.73 g/mol
Exact Mass1898.93
IUPAC Name(6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide
SMILESCSCC[C@H](NC(=O)CNC(=O)C(Cc1ccccc1Cl)NC(=O)[C@@H](NC(=O)[C@@H](NC(C)=O)[C@@H](C)O)[C@@H](C)O)C(=O)N[C@@H](CCSC)C(=O)N[C@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCCN)C(=O)N[C@H]1CCCCn2cc(nn2)C[C@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CO)C(N)=O)NC(=O)[C@H](CCCCN)NC(=O)[C@H](Cc2ccccc2)NC(=O)[C@H](C)NC1=O)[C@@H](C)O
InChIInChI=1S/C85H135ClN22O21S2/c1-45(2)37-61(80(124)103-66(44-109)71(89)115)99-82(126)65-41-54-43-108(107-106-54)34-22-19-29-56(74(118)91-47(5)72(116)98-63(39-52-23-13-12-14-24-52)81(125)96-58(76(120)100-65)28-18-21-33-88)94-75(119)57(27-17-20-32-87)95-79(123)62(38-46(3)4)101-83(127)69(49(7)111)104-78(122)60(31-36-131-11)97-77(121)59(30-35-130-10)93-67(114)42-90-73(117)64(40-53-25-15-16-26-55(53)86)102-84(128)70(50(8)112)105-85(129)68(48(6)110)92-51(9)113/h12-16,23-26,43,45-50,56-66,68-70,109-112H,17-22,27-42,44,87-88H2,1-11H3,(H2,89,115)(H,90,117)(H,91,118)(H,92,113)(H,93,114)(H,94,119)(H,95,123)(H,96,125)(H,97,121)(H,98,116)(H,99,126)(H,100,120)(H,101,127)(H,102,128)(H,103,124)(H,104,122)(H,105,129)/t47-,48+,49+,50+,56-,57-,58-,59-,60-,61-,62-,63-,64?,65+,66-,68-,69-,70-/m0/s1
InChIKeyIMALDMTYLCUSBN-ITINEMRRSA-N
XLogP-4.95
TPSA672.36 Ų
H-Bond Donors23
H-Bond Acceptors28
Rotatable Bonds50
Heavy Atoms131
Complexity

Lipinski Rule of Five

3 violations

RuleValue
MW ≤ 5001900.73
LogP ≤ 5-4.95
H-Bond Donors ≤ 523
H-Bond Acceptors ≤ 1028

Computed Properties (RDKit)

Structural Alerts{'alert_name': 'Aliphatic_long_chain', 'substructure': 'N/A'}

Analyze (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide with MolForge

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Related Compounds

Frequently Asked Questions

What is the IUPAC name of (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide?
The IUPAC name of (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide (CID 127034809) is (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide.
What is the SMILES notation for (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide?
The canonical SMILES for (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide is CSCC[C@H](NC(=O)CNC(=O)C(Cc1ccccc1Cl)NC(=O)[C@@H](NC(=O)[C@@H](NC(C)=O)[C@@H](C)O)[C@@H](C)O)C(=O)N[C@@H](CCSC)C(=O)N[C@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCCN)C(=O)N[C@H]1CCCCn2cc(nn2)C[C@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CO)C(N)=O)NC(=O)[C@H](CCCCN)NC(=O)[C@H](Cc2ccccc2)NC(=O)[C@H](C)NC1=O)[C@@H](C)O.
What is the InChIKey of (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide?
The InChIKey is IMALDMTYLCUSBN-ITINEMRRSA-N. The full InChI is InChI=1S/C85H135ClN22O21S2/c1-45(2)37-61(80(124)103-66(44-109)71(89)115)99-82(126)65-41-54-43-108(107-106-54)34-22-19-29-56(74(118)91-47(5)72(116)98-63(39-52-23-13-12-14-24-52)81(125)96-58(76(120)100-65)28-18-21-33-88)94-75(119)57(27-17-20-32-87)95-79(123)62(38-46(3)4)101-83(127)69(49(7)111)104-78(122)60(31-36-131-11)97-77(121)59(30-35-130-10)93-67(114)42-90-73(117)64(40-53-25-15-16-26-55(53)86)102-84(128)70(50(8)112)105-85(129)68(48(6)110)92-51(9)113/h12-16,23-26,43,45-50,56-66,68-70,109-112H,17-22,27-42,44,87-88H2,1-11H3,(H2,89,115)(H,90,117)(H,91,118)(H,92,113)(H,93,114)(H,94,119)(H,95,123)(H,96,125)(H,97,121)(H,98,116)(H,99,126)(H,100,120)(H,101,127)(H,102,128)(H,103,124)(H,104,122)(H,105,129)/t47-,48+,49+,50+,56-,57-,58-,59-,60-,61-,62-,63-,64?,65+,66-,68-,69-,70-/m0/s1.
What are the key properties of (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide?
(6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide has a molecular weight of 1900.73 g/mol, XLogP of -4.95, 50 rotatable bonds, 23 hydrogen bond donors, and 28 hydrogen bond acceptors.
Where does this data come from?
All data for (6S,9S,12S,15S,18R)-6-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[2-[[2-[[(2S,3R)-2-[[(2S,3R)-2-acetamido-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(2-chlorophenyl)propanoyl]amino]acetyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxybutanoyl]amino]-4-methylpentanoyl]amino]-6-aminohexanoyl]amino]-15-(4-aminobutyl)-N-[(2S)-1-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-12-benzyl-9-methyl-7,10,13,16-tetraoxo-1,8,11,14,17,21,22-heptazabicyclo[18.2.1]tricosa-20(23),21-diene-18-carboxamide is sourced from PubChem (CID 127034809), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).