((S)-1-(3,3-difluoro-2-hydroxy-6-oxo-piperidin-1-ylmethyl)-3-[2-(2-methoxy-ethyl)-4-trifluoromethyl-5,8-dihydro-6H-pyrido[3,4-d]pyrimidin-7-yl]-3-oxo-propyl)-carbamic acid t-butyl ester 生成 ((S)-1-(3,3-difluoro-(R)-2-hydroxy-6-oxo-piperidin-1-ylmethyl)-3-[2-(2-methoxy-ethyl)-4-trifluoromethyl-5,8-dihydro-6H-pyrido[3,4-d]pyrimidin-7-yl]-3-oxo-propyl)-carbamic acid t-butyl ester 、 ((S)-1-(3,3-difluoro-(S)-2-hydroxy-6-oxo-piperidin-1-ylmethyl)-3-[2-(2-methoxy-ethyl)-4-trifluoromethyl-5,8-dihydro-6H-pyrido[3,4-d]pyrimidin-7-yl]-3-oxo-propyl)-carbamic acid t-butyl ester