| 摘要 |
There are disclosed a novel alpha-amino-N-(diaminophosphinyl)lactam derivative represented by general formula (1): wherein, for example, A is a hydrogen atom or a substituent such as a lower alkyl group or the like; W, X, Y and Z are independently a hydrogen atom or a substituent such as a lower alkyl group, aryl group, arylacyl group, arylaminocarbonyl group or the like; and Q is -(CH<SUB>2</SUB>)<SUB>n</SUB>- wherein n is 0 to 3, or its salt, and a therapeutic agent and a prophylactic agent for myelosuppression, a therapeutic agent for infectious diseases, an agent for increasing the number of leukocytes and a dipeptidyl peptidase IV inhibitor which comprise the above-mentioned derivative or salt thereof as an active ingredient.
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