4'-Demethylepipodophyllotoxin 5-19-10-00665 (Beilstein Handbook Reference) 6559-91-7 BRN 1358259 Furo(3',4':6,7)naphtho(2,3-d)-1,3-dioxol-6(5ah)-one, 5,8,8a,9-tetrahydro-9-hydroxy-5-(4-hydroxy-3,5-dimethoxyphenyl)-, (5R-(5-alpha,5a-beta,8a-alpha,9-beta))-