The (2S)-(-)-isomer of (5-amino-1,2-dihydro-2-methyl-3-phenylpyrido[3,4-b]pyrazin-7-yl)arbamic acid, ethyl ester is significantly more potent than either the (2R)-(+)-isomer or the (R,S)-(.+-.)- racemic mixture in inhibiting mitotic cell division of L1210 leukemia cells. The compound, pharmaceutical compositions containing the compound, and a method of ameliorating cancer diseases in mammals are disclosed.
(2S)-(-)-异构体(5-
氨基-1,2-二氢-
2-甲基-3-苯基吡啶并[3,4-b]
吡唑啉-7-基)
氨基甲酸乙酯的抗白血病细胞分裂活性明显高于(2R)-(+)-异构体或(R,S)-(.+-.)-消旋混合物。该化合物、含有该化合物的药物组合物以及一种在哺乳动物中改善癌症疾病的方法被披露。