1-(4-chloro-3-(1-ethyl-7-(methylamino)-2-oxo-1,2-dihydro-1,6-naphthyridin-3-yl)phenyl)-3-phenylurea 、
乙腈 、
甲烷磺酸 、
水 以
乙酸乙酯 为溶剂,
以to afford 1-(4-chloro-3-(1-ethyl-7-(methylamino)-2-oxo-1,2-dihydro-1,6-naphthyridin-3-yl)phenyl)-3-phenylurea methanesulfonate (172 mg, 85% yield)的产率得到1-(4-chloro-3-(1-ethyl-7-(methylamino)-2-oxo-1,2-dihydro-1,6-naphthyridin-3-yl)phenyl)-3-phenylurea methanesulfonate