55568-79-1 Epiisopodophyllotoxin Furo(3',4':6,7)naphtho(2,3-d)-1,3-dioxol-6(5H)-one, 5,8,8a,9-tetrahydro-9-hydroxy-5-(3,4,5-trimethoxyphenyl)-, (5R-(5alpha,5aalpha,8abeta,9alpha))-