(2R,5S,6S)-5-(1-hydroxy-1-methylethyl)-2-methyl-8-(3-methylbut-2-en-1-yl)-7,10-dioxo-3,4,5,6,7,10-hexahydro-2H-2,6-methano-1-benzoxocin-9-yl rel-2-methylpropanoate Erectquione C InChI=1/C25H34O6/c1-13(2)8-9-15-19(26)18-16-12-25(7,11-10-17(16)24(5,6)29)31-22(18)20(27)21(15)30-23(28)14(3)4/h8,14,16-17,29H,9-12H2,1-7H3/t16?,17-,25+/m0/s Isobutyric acid 12-(1-hydroxy-1-methyl-ethyl)-9-methyl-4-(3-methyl-but-2-enyl)-3,6-dioxo-8-oxa-tricyclo[7.3.1.0^(2,7)]trideca-2(7),4-dien-5-yl ester propanoic acid, 2-methyl-, (2R,5S,6S)-3,4,5,6,7,10-hexahydro-5-(1-hydroxy-1-methylethyl)-2-methyl-8-(3-methyl-2-butenyl)-7,10-dioxo-2,6-methano-2H-1-benzoxocin-9-yl ester