N-({(3S,4S)-1-[2-(3-chloro-5-methyl-6-oxo-5,6-dihydro-1,5-naphthyridin-4-yl)ethyl]-4-hydroxy-3-pyrrolidinyl}methyl)-2,2,2-trifluoroacetamide 、
3-氧代-3,4-二氢-2H-吡啶并[3,2-b][1,4]噻嗪-6-甲醛 、 在
6-{[({(3S,4S)-1-[2-(3-Chloro-5-methyl-6-oxo-5,6-dihydro-1,5-naphthyridin-4-yl)ethyl]-4-hydroxy-3-pyrrolidinyl}methyl)amino]methyl}-2H-pyrido[3,2-b][1,4]thiazin-3(4H)-one dihydrochloride 、 Acetonitrile water formic acid 作用下,
以to give the title compound (11 mg)的产率得到6-{[({(3S,4S)-1-[2-(3-Chloro-5-methyl-6-oxo-5,6-dihydro-1,5-naphthyridin-4-yl)ethyl]-4-hydroxy-3-pyrrolidinyl}methyl)amino]methyl}-2H-pyrido[3,2-b][1,4]thiazin-3(4H)-one dihydrochloride