CC1COC2(C)Oc3c(c(O)c(C(N)=O)c4c3CC3C(C)COC3(C)O4)CC12	11-hydroxy-4,7,15,18-tetramethyl-3,5,14,16-tetraoxapentacyclo[11.7.0.02,10.04,8.015,19]icosa-1,10,12-triene-12-carboxamide