3-(2-propyl-2H-tetrazol-5-yl)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine 、
甲烷磺酸 以
乙醇 为溶剂,
以1.77 g (87.84%) of the title compound were obtained in the form of white crystals, m.p.: 154°-155° C.的产率得到3-(2-propyl-2H-tetrazol-5-yl)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine methane-sulfonic acid salt