Synonyms: 2-Butenoicacid, 4-hydroxy-3-methyl-, [1,1a,1b,2,3,4,4a,6,8,8a,9,9a,10,10a,10b,10c,11,11b-octadecahydro-2,9-dihydroxy-7-(hydroxymethyl)-4-(2-methoxy-1-methyl-2-oxoethylidene)-1b,10b-dimethyl-3,6-dioxocyclopropa[4,5]cyclopropa[4',5']cyclopent[1',2':7,8]acephenanthryleno[10a,10-b]furan-9-yl]methylester, [1aR-[1aa,1bb,2b,4Z,4ab,4bS*,8aa,9b,9(E),9aa,10aa,10bb,10cb,11ba]]-; (-)-Shizukaol I; Shizukaol I