Synonyms: 2-Butenoicacid, 4-hydroxy-2-methyl-,[2,3,3a,4,5,6,6a,7,9a,9b-decahydro-4-[(4-hydroxy-2-methyl-1-oxo-2-butenyl)oxy]-3,6-bis(methylene)-2-oxoazuleno[4,5-b]furan-9-yl]methylester, [3aR-[3aa,4a(E),6ab,9(Z),9aa,9bb]]-; Azuleno[4,5-b]furan,2-butenoic acid deriv.; Pericomin