5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one

C170H210N22O30 — CID 159576018

About 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one

5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one (PubChem CID 159576018) has the molecular formula C170H210N22O30 and a molecular weight of 3041.67 g/mol. Its IUPAC name is 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one.

Molecular Properties

• Compound Name: 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one
• PubChem CID: 159576018
• Molecular Formula: C170H210N22O30
• Molecular Weight: 3041.67 g/mol
• Exact Mass: 3039.56
• IUPAC Name: 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one
• SMILES: CC(C)C(C)C(=O)N1C(=O)C2(CCCN2C(=O)OCc2ccccc2)C1c1ccccc1.CC(C)C(N)C(=O)N1C(=O)C2(CCCN2)C1c1ccccc1.CC(C)C(N)C(=O)N1C(=O)C2(CCCN2C(=O)OCc2ccccc2)C1c1ccccc1.CC(C)C(N)C(=O)N1CC2(CCCN2C(=O)C2CCCN2C(=O)C(N)C(C)O)C1=O.CC(O)C(N)C(=O)N1CC2(CCCN2C(=O)C2CCCN2C(=O)C(NC(=O)OCc2ccccc2)C(C)O)C1=O.CN1C(=O)C2(CCCN2C(=O)OCc2ccccc2)C1c1ccccc1.O=C(OCc1ccccc1)N1CCCC12C(=O)CC2c1ccccc1.O=C1CC(c2ccccc2)C12CCCN2
• InChI: InChI=1S/C27H37N5O8.C26H30N2O4.C25H29N3O4.C21H22N2O3.C21H21NO3.C20H33N5O5.C17H23N3O2.C13H15NO/c1-16(33)20(28)23(36)31-15-27(25(31)38)11-7-13-32(27)22(35)19-10-6-12-30(19)24(37)21(17(2)34)29-26(39)40-14-18-8-4-3-5-9-18;1-18(2)19(3)23(29)28-22(21-13-8-5-9-14-21)26(24(28)30)15-10-16-27(26)25(31)32-17-20-11-6-4-7-12-20;1-17(2)20(26)22(29)28-21(19-12-7-4-8-13-19)25(23(28)30)14-9-15-27(25)24(31)32-16-18-10-5-3-6-11-18;1-22-18(17-11-6-3-7-12-17)21(19(22)24)13-8-14-23(21)20(25)26-15-16-9-4-2-5-10-16;23-19-14-18(17-10-5-2-6-11-17)21(19)12-7-13-22(21)20(24)25-15-16-8-3-1-4-9-16;1-11(2)14(21)17(28)24-10-20(19(24)30)7-5-9-25(20)16(27)13-6-4-8-23(13)18(29)15(22)12(3)26;1-11(2)13(18)15(21)20-14(12-7-4-3-5-8-12)17(16(20)22)9-6-10-19-17;15-12-9-11(10-5-2-1-3-6-10)13(12)7-4-8-14-13/h3-5,8-9,16-17,19-21,33-34H,6-7,10-15,28H2,1-2H3,(H,29,39);4-9,11-14,18-19,22H,10,15-17H2,1-3H3;3-8,10-13,17,20-21H,9,14-16,26H2,1-2H3;2-7,9-12,18H,8,13-15H2,1H3;1-6,8-11,18H,7,12-15H2;11-15,26H,4-10,21-22H2,1-3H3;3-5,7-8,11,13-14,19H,6,9-10,18H2,1-2H3;1-3,5-6,11,14H,4,7-9H2
• InChIKey: MIKLBVOUSLPDHA-UHFFFAOYSA-N
• XLogP: 15.65
• TPSA: 693.93 Ų
• H-Bond Donors: 11
• H-Bond Acceptors: 37
• Rotatable Bonds: 33
• Heavy Atoms: 222
• Complexity: —

Lipinski Rule of Five

4 violations

Rule	Value
MW ≤ 500	3041.67
LogP ≤ 5	15.65
H-Bond Donors ≤ 5	11
H-Bond Acceptors ≤ 10	37

Computed Properties (RDKit)

• Structural Alerts: {'alert_name': '>_2_ester_groups', 'substructure': 'N/A'}

Frequently Asked Questions

What is the IUPAC name of 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one?

The IUPAC name of 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one (CID 159576018) is 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one.

What is the SMILES notation for 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one?

The canonical SMILES for 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one is CC(C)C(C)C(=O)N1C(=O)C2(CCCN2C(=O)OCc2ccccc2)C1c1ccccc1.CC(C)C(N)C(=O)N1C(=O)C2(CCCN2)C1c1ccccc1.CC(C)C(N)C(=O)N1C(=O)C2(CCCN2C(=O)OCc2ccccc2)C1c1ccccc1.CC(C)C(N)C(=O)N1CC2(CCCN2C(=O)C2CCCN2C(=O)C(N)C(C)O)C1=O.CC(O)C(N)C(=O)N1CC2(CCCN2C(=O)C2CCCN2C(=O)C(NC(=O)OCc2ccccc2)C(C)O)C1=O.CN1C(=O)C2(CCCN2C(=O)OCc2ccccc2)C1c1ccccc1.O=C(OCc1ccccc1)N1CCCC12C(=O)CC2c1ccccc1.O=C1CC(c2ccccc2)C12CCCN2.

What is the InChIKey of 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one?

The InChIKey is MIKLBVOUSLPDHA-UHFFFAOYSA-N. The full InChI is InChI=1S/C27H37N5O8.C26H30N2O4.C25H29N3O4.C21H22N2O3.C21H21NO3.C20H33N5O5.C17H23N3O2.C13H15NO/c1-16(33)20(28)23(36)31-15-27(25(31)38)11-7-13-32(27)22(35)19-10-6-12-30(19)24(37)21(17(2)34)29-26(39)40-14-18-8-4-3-5-9-18;1-18(2)19(3)23(29)28-22(21-13-8-5-9-14-21)26(24(28)30)15-10-16-27(26)25(31)32-17-20-11-6-4-7-12-20;1-17(2)20(26)22(29)28-21(19-12-7-4-8-13-19)25(23(28)30)14-9-15-27(25)24(31)32-16-18-10-5-3-6-11-18;1-22-18(17-11-6-3-7-12-17)21(19(22)24)13-8-14-23(21)20(25)26-15-16-9-4-2-5-10-16;23-19-14-18(17-10-5-2-6-11-17)21(19)12-7-13-22(21)20(24)25-15-16-8-3-1-4-9-16;1-11(2)14(21)17(28)24-10-20(19(24)30)7-5-9-25(20)16(27)13-6-4-8-23(13)18(29)15(22)12(3)26;1-11(2)13(18)15(21)20-14(12-7-4-3-5-8-12)17(16(20)22)9-6-10-19-17;15-12-9-11(10-5-2-1-3-6-10)13(12)7-4-8-14-13/h3-5,8-9,16-17,19-21,33-34H,6-7,10-15,28H2,1-2H3,(H,29,39);4-9,11-14,18-19,22H,10,15-17H2,1-3H3;3-8,10-13,17,20-21H,9,14-16,26H2,1-2H3;2-7,9-12,18H,8,13-15H2,1H3;1-6,8-11,18H,7,12-15H2;11-15,26H,4-10,21-22H2,1-3H3;3-5,7-8,11,13-14,19H,6,9-10,18H2,1-2H3;1-3,5-6,11,14H,4,7-9H2.

What are the key properties of 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one?

5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one has a molecular weight of 3041.67 g/mol, XLogP of 15.65, 33 rotatable bonds, 11 hydrogen bond donors, and 37 hydrogen bond acceptors.

Where does this data come from?

All data for 5-[1-(2-amino-3-hydroxybutanoyl)pyrrolidine-2-carbonyl]-2-(2-amino-3-methylbutanoyl)-2,5-diazaspiro[3.4]octan-3-one;2-(2-amino-3-methylbutanoyl)-1-phenyl-2,5-diazaspiro[3.4]octan-3-one;benzyl N-[1-[2-[2-(2-amino-3-hydroxybutanoyl)-3-oxo-2,5-diazaspiro[3.4]octane-5-carbonyl]pyrrolidin-1-yl]-3-hydroxy-1-oxobutan-2-yl]carbamate;benzyl 2-(2-amino-3-methylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-(2,3-dimethylbutanoyl)-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 2-methyl-3-oxo-1-phenyl-2,5-diazaspiro[3.4]octane-5-carboxylate;benzyl 3-oxo-1-phenyl-5-azaspiro[3.4]octane-5-carboxylate;1-phenyl-5-azaspiro[3.4]octan-3-one is sourced from PubChem (CID 159576018), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).