Aim：To synthesize the ent-kaurene diterpenoid and its derivatives from natural available stevioside. Methods：The crucial pharmacophore of exo-methylene ketone was designed and the carboxyl group at C-4 was modifiedThe cytotoxic inhibition activities in vitro of target compounds were evaluated against human cancer cells BEL-7402，HO-8910，MCF-7 and HL-60 by a MTT method. Results and Conclusion：The structures of new target compounds were identified by 1H NMR，FT-IR and EI-MS. The preliminary experimental results showed that some derivatives of ent-kaurene diterpenoid possessed fair inhibitory activity against tumor cell lines compared with that of their parent steviol.
张大永,汤 湧,王 可,吴晓明,华维一.ent-贝壳杉烯类化合物的合成及其抗肿瘤活性[J].中国药科大学学报,2010,41(1):20-25.
Cite：. Synthesis and antitumor activity of ent-kaurene diterpenoids[J]. J China Pharm Univ,2010,41(1):20-25.