COc1cc(OC)c2c(c1)C(=O)c1cc3c(c(O)c1C2=O)C1CCOC1O3	2-hydroxy-16,18-dimethoxy-7,9-dioxapentacyclo[10.8.0.03,10.04,8.014,19]icosa-1,3(10),11,14(19),15,17-hexaene-13,20-dione