Formula: C26H22O8 | Mol. Weight: 462.40 g/mol
IUPAC: methyl 7,14-dihydroxy-18,18-dimethyl-5,12-dioxo-9-prop-1-en-2-yl-2,17-dioxapentacyclo[11.8.0.03,11.04,8.016,21]henicosa-1(13),3,8,10,14,16(21),19-heptaene-7-carboxylate
CC(=C)C1=C2C(=C3C(=C1)C(=O)C4=C(O3)C5=C(C=C4O)OC(C=C5)(C)C)C(=O)CC2(C(=O)OC)O