2-(4-bromobenzyl)-8-(4-(SR)-phenylpyrrolidin-3-(RS)-ylmethyl)-2,8-diaza-spiro[4.5]decan-1-one 、
{6-Methyl-2-oxo-3-[2-(pyridin-2-yloxy)-ethylamino]-2H-pyrazin-1yl}-acetic acid ethyl ester 以
DMF (N,N-dimethyl-formamide) 为溶剂,
以37.2%的产率得到8-(1-benzoyl-4-(RS)-phenylpyrrolidin-3-(RS)-ylmethyl)-2-(4-bromobenzyl)-2,8-diaza-spiro[4.5]decan-1-one hydrochloride