[Synthesis and antitumor activities of 4-acylamido-4-deoxy-4'-demethylepipodophyllotoxin analogues]

Twenty four 4-acylamidc-4-deoxy-4'-demethylepipodophyllotoxins were synthesized by acylation of 4-amino-4-deoxy-4'-demethylepipodophyllotoxin by means of usual methods, and screened in vitro. This type of compounds showed strong antitumor activities, most of them are superior to etoposide in the inhibition against L1210 and KB cells.