Synonyms: 7,11-Methano-2H-cycloocta[f][2]benzopyran-8-aceticacid,4-(3-furanyl)-1,4a,5,6,6a,7,8,9,10,11,12b-dodecahydro-4a,7,9,9-tetramethyl-10-(2-methyl-1-oxopropoxy)-2,13-dioxo-,methyl ester, (4a,4aa,6aa,7a,8a,10b,11a,12ba)-;7,11-Methano-2H-cycloocta[f][2]benzopyran-8-acetic acid, 4b-(3-furyl)-1,4,4a,5,6,6a,7,8,9,10,11a,12bb-dodecahydro-10a-hydroxy-4ab,7a,9,9-tetramethyl-2,13-dioxo-, methyl ester, isobutyrate (8CI); Isobutyricacid, ester with methyl 4b-(3-furyl)-1,4,4a,5,6,6a,7,8,9,10,11a,12bb-dodecahydro-10a-hydroxy-4ab,7a,9,9-tetramethyl-2,13-dioxo-7,11-methano-2H-cycloocta[f][2]benzopyran-8-acetate(8CI)