Since it has been confirmed that the antitumor agents of the invention containing as the active agent (3R)-N-(1-(1-tert-butylcarbonylmethyl)-2,3-dihydro-2-oxo-5-(2-pyridyl)-1H-1,4-benzodiazepin-3-yl)-N'-(3-(methylamino)phenyl)urea favorably inhibit the proliferation of cancer in various cancer-bearing mice and have a low toxicity, they are particularly useful in treating pancreatic cancer, intestinal cancer and gastric cancer. In case of using the medicaments of the invention particularly in polypharmaceutical chemotherapy, administration dose of an antitumor agent having strong side effects can be lowered, so that realization of a polypharmaceutical chemotherapy achieving a favorable antitumor effect and reduced side effects can be expected.
由于已证实本发明的抗肿瘤剂含有作为活性剂的(3R)-N-(1-(1-叔丁基羰基甲基)-
2,3-二氢-2-氧代-5-(2-
吡啶基)-1H-1、4-
苯并二氮杂卓-3-基)-N'-(3-(甲基
氨基)苯基)
脲能有效抑制各种癌症小鼠的癌细胞增殖,且毒性低,特别适用于治疗胰腺癌、肠癌和胃癌。特别是在多药化疗中使用本发明的药物时,可以降低副作用大的
抗肿瘤药物的用药剂量,从而有望实现抗肿瘤效果好、副作用小的多药化疗。