beta-peltatin A methyl ether

Furo(3',4':6,7)naphtho(2,3-D)-1,3-dioxol-6(5ah)-one, 5,8,8A,9-tetrahydro-10-methoxy-5-(3,4,5-trimethoxyphenyl)-, (5R-(5alpha,5abeta,8aalpha))-