K252b

K-252B

Also known as: (15R,16S,18S)-16-Hydroxy-15-methyl-3-oxo-28-oxa-4,14,19-triazaoctacyclo[12.11.2.1.0.0.0.0.0]octacosa-1,6,8,10,12,20,22,24,26-nonaene-16-carboxylic acid, (5R,6S,8S)-6-hydroxy-5-methyl-13-oxo-5,6,7,8,14,15-hexahydro-13H-5,8-epoxy-4b,8a,14-triazadibenzo[b,h]cycloocta[1,2,3,4-jkl]cyclopenta[e]-as-indacene-6-carboxylic acid, 6,9-Epoxy-15H-diindolo[1,2,3-fg:3',2',1'-kl]pyrrolo[3,4-i][1,6]benzodiazocine-7-carboxylic acid, 6,7,8,9,16,17-hexahydro-7-hydroxy-6-methyl-15-oxo-, (6R,7S,9S)-, 9,12-Epoxy-1H-diindolo[1,2,3-fg:3',2',1'-kl]pyrrolo[3,4-i][1,6]benzodiazocine-10-carboxylicacid,2,3,9,10,11,12-hexahydro-10-hydroxy-9-methyl-1-oxo-,(9S,10R,12R), Antibiotic K 252b, K-252B, NOCARDIOPSIS SP, K-252B, NOCARDIOPSIS SPECIES, K-252b solution, K252B READY MADE, KT 5556, MFCD00132117, PROTEIN KINASE INHIBITOR K-252B, k-252b solution

K252b (CAS 99570-78-2) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C26H19N3O5 and a molecular weight of 453.446 g/mol. It is also known as (15R,16S,18S)-16-Hydroxy-15-methyl-3-oxo-28-oxa-4,14,19-triazaoctacyclo[12.11.2.1.0.0.0.0.0]octacosa-1,6,8,10,12,20,22,24,26-nonaene-16-carboxylic acid, (5R,6S,8S)-6-hydroxy-5-methyl-13-oxo-5,6,7,8,14,15-hexahydro-13H-5,8-epoxy-4b,8a,14-triazadibenzo[b,h]cycloocta[1,2,3,4-jkl]cyclopenta[e]-as-indacene-6-carboxylic acid and 6,9-Epoxy-15H-diindolo[1,2,3-fg:3',2',1'-kl]pyrrolo[3,4-i][1,6]benzodiazocine-7-carboxylic acid, 6,7,8,9,16,17-hexahydro-7-hydroxy-6-methyl-15-oxo-, (6R,7S,9S)-. Key properties include a boiling point of 769.8±60.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 419.4±32.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

99570-78-2

Jingsj CID

J-89738-5

Molecular Formula

C₂₆H₁₉N₃O₅

Chinese Name

K-252B

Molecular Weight

453.446 g/mol

Category

Organic Compounds

Last updated

8/21/2026