33419-42-0 4'-Demethylepipodophyllotoxin ethylidene-.beta.-D-glucoside AIDS-001998 AIDS001998 Etoposide Furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxol-6(5aH)-one, 9-[[4,6-O-(1R)-ethylidene-.beta.-D-glucopyranosyl]oxy]-5,8,8a,9-tetrahydro-5-(4-hydroxy-3,5-dimethoxyphenyl)-, (5R,5aR,8aR,9S)- Lastet NSC141540 Toposar VP-16-213 VP16 Vepesid Zuyeyidal