Formula: C21H18O6 | Mol. Weight: 366.40 g/mol
IUPAC: 6-hydroxy-21-methoxy-17,17-dimethyl-3,12,16-trioxapentacyclo[11.8.0.02,10.04,9.015,20]henicosa-1(21),2(10),4(9),5,7,13,15(20)-heptaen-11-one
CC1(CCC2=C(O1)C=C3C(=C2OC)C4=C(C5=C(O4)C=C(C=C5)O)C(=O)O3)C