4-[1-(2,5-difluorobenzyl)-2-oxo-1,2,3,4-tetrahydropyrido[2,3-b]pyrazin-7-yl]benzoic acid 、
(S)-(pyrrolidinemethyl)pyrrolidine 以to give the title compound as a white solid (32% yield)的产率得到1-(2,5-difluorobenzyl)-7-[4-((S)-2-[(pyrrolidin-1-yl)methyl]pyrrolidine-1-carbonyl)phenyl]-3,4-dihydro-1H-pyrido[2,3-b]pyrazin-2-one