4a(2H)-phenanthrenecarboxylic acid, 7-ethenyl-1,3,4,4b,5,6,7,9,10,10a-decahydro-4b-hydroxy-1,1,7-trimethyl-9-oxo-, methyl ester, (4aR,4bR,7R,10aS)- 4b-Hydroxy-1,1,7-trimethyl-9-oxo-7-vinyl-1,3,4,4b,5,6,7,9,10,10a-decahydro-2H-phenanthrene-4a-carboxylic acid methyl ester InChI=1/C21H30O4/c1-6-19(4)10-11-21(24)14(13-19)15(22)12-16-18(2,3)8-7-9-20(16,21)17(23)25-5/h6,13,16,24H,1,7-12H2,2-5H3/t16-,19-,20-,21+/m0/s Sphaeropsidin C methyl ester methyl (13alpha)-9-hydroxy-7-oxopimara-8(14),15-dien-20-oate