反应详情

(S)-4-Glycyl-3-(1-methylpropyl)-2-oxopiperazine-1-acetic acid t-butyl ester hydrochloride obtained in Working Example 64 (364 mg) and 215 mg of 4-guanidino benzoic acid hydrochloride were subjected to substantially the same procedure as in Working Example 39 to afford 190 mg of the title compound as colorless powder.