(3S)-3-benzyloxycarbonylamino-6-methoxycarbonylaminohexanoic acid 、 (R)-3,4,5,6-tetrahydro-5-methylamino-2-ureidopyrimidin-4-one 以13%的产率得到(3'S,5R,S)-5-[N-Methyl-N-(3'-amino-6'-methoxycarbonylaminohexanoyl)-amino]-5,6-dihydro-2-ureido-4(1H)-pyrimidone Hydrochloride