1-(4-Aminobenzyl)-2,3-dioxopiperazine derivatives, acid addition salts thereof and process for producing same

摘要

A 1-(4-aminobenzyl)-2,3-dioxopiperazine derivative represented by the formula: <IMAGE> and an acid addition salt thereof have excellent carcinostatic activity but a low toxicity. Therefore, said compounds are useful as medicines and also as intermediates.