[摘要]：In a continuing effort to develop novel beta-carbolines endowed with better pharmacological profiles, a series of beta-carboline derivatives were designed and synthesized based on the previously developed SARs. Cytotoxicities in vitro of these compounds against a panel of human tumor cell lines were also investigated. The results demonstrated that the N-2-benzylated beta-carbolinium bromides 56-60 represented the most potent compounds with IC50 values lower than 10 mu M. The application of 3D-QSAR to these compounds explored the structural basis for their biological activities. CoMFA (q(2) = 0.513, r(2) = 0.862) and CoMSIA (q(2) = 0.503, r(2) = 0.831) models were developed for a set of 47 beta-carbolines. The results indicated that the antitumor pharmacophore of these molecules were marked at position-1, -2, -3, -7 and -9 of beta-carboline ring.
