Seven benzylamino derivatives of podophyllotoxin 8a-8g were synthesized and their chemical structures were confirmed by IR, ¹H-NMR, (13)C-NMR and ESI-MS spectral analyses. Their abilities to inhibit the growth of cancer cells A549, HCT-116 and HepG2, were investigated by MTT assay. Compound 8b possessed the highest cytotoxicity on cancer cell lines with average IC(50) values of 3.8 µM. All we synthetic compounds were cytotoxic against three cancer cell lines at the micromolar range, indicating podophyllotoxin derivatives with structural modification of benzylamino possess potent antitumor activity.
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