(R)-(-)-2-[3-[3-(1-tert-butylcarbonylmethyl-2-oxo-5-cyclohexyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-3-yl)ureido]phenyl]-2-methylpropionic acid 、
N,N'-二苄基乙二胺 以
乙腈 为溶剂,
以whereby the title compound (200 mg) was obtained的产率得到(R)-(-)-2-[3-[3-(1-tert-butylcarbonylmethyl-2-oxo-5-cyclohexyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-3-yl)ureido]phenyl]-2-methylpropionic acid N,N'-dibenzylethylenediamine salt