4'-Demethylpicropodophyllotoxin 5,8,8a,9-Tetrahydro-9-hydroxy-5-(4-hydroxy-3,5-dimethoxyphenyl)furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxol-6(5aH)-one, [5R-(5.alpha.,5a.alpha.,8a.alpha.,9.alpha.)] AIDS-006793 AIDS006793