Synonyms: 2-Butenoicacid, 3-methyl-,(1Z)-2-[(1R,2S,7S)-5-(hydroxymethyl)-2-methyl-2-(4-methyl-3-pentenyl)-6-oxo-7-(2-oxopropyl)-4-cyclohepten-1-yl]ethenylester (9CI); 2-Butenoic acid, 3-methyl-,2-[5-(hydroxymethyl)-2-methyl-2-(4-methyl-3-pentenyl)-6-oxo-7-(2-oxopropyl)-4-cyclohepten-1-yl]ethenylester, [1a(Z),2a,7a]-(+)-; (+)-(8Z)-10-epi-Vibsanin B; Vibsanin D