4-tert-butoxycarbonylaminomethyl-2-(3-methoxycarbonylpropyl)aniline 、
(S)-9-bromo-5-(carboxymethyl)-6,7-dihydro-1H,5H-pyrido<1,2,3-de>quinoxaline-2,3-dione 以to give 118 mg of the title compound (62%)的产率得到(S)-9-bromo-5-[p-tert-butoxycarbonylaminomethyl-o-(3-methoxycarbonylpropyl)phenylcarbamoylmethyl]-6,7-dihydro-1H, 5H-pyrido[1,2,3-de]quinoxaline-2,3-dione