28057-72-9 7,11-Methano-2H-cycloocta(f)(2)benzopyran-8-acetic acid, 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, (4alpha,4aalpha,6aalpha,7alpha,8alpha,10beta,11alpha,12balpha)- MIOE Methyl 3-isobutyryloxy-1-oxomeliac-8(30)-enate