51733-45-0 BRN 1674022 Lankacidin C 14-valerate Pentanoic acid, 2-((1,2-dioxopropyl)amino)-7-hydroxy-1,4,10,19-tetramethyl-17,18-dioxo-16-oxabicyclo(13.2.2)nonadeca-3,5,9,11-tetraen-13-yl ester, (1S-(1R*,2S*,3E,5E,7R*,9E,11E,13R*,15S*,19S*))-