Synonyms: 2H-Pyran-2-one,3-[[(1R,4aR,5S,6S,8aR)-6-(acetyloxy)decahydro-5,8a-dimethyl-2-methylene-5-(4-methyl-3-pentenyl)-1-naphthalenyl]methyl]-4-hydroxy-5,6-dimethyl-,rel-(-)- (9CI); 2H-Pyran-2-one,3-[[6-(acetyloxy)decahydro-5,8a-dimethyl-2-methylene-5-(4-methyl-3-pentenyl)-1-naphthalenyl]methyl]-4-hydroxy-5,6-dimethyl-,(1a,4aa,5a,6b,8ab)-(-)-; (-)-Sesquicillin; Sesquicillin; Sesquicillin A