25088-82-8 5,5a,6,8,8a,9-Hexahydro-5-(3,4,5-trimethoxyphenyl)furo(3',4':6,7)naphtho(2,3-d)-1,3-dioxole stereoisomer Furo(3',4':6,7)naphtho(2,3-d)-1,3-dioxole, 5,5a,6,8,8a,9-hexahydro-5-(3,4,5-trimethoxyphenyl)-, stereoisomer