Disclosed is a benz[d][1,3]oxazine derivative having excellent stability when used as an active ingredient for a medicinal agent, and also having excellent solubility and crystallinity. Specifically disclosed is 2-[2-((S)-3-dimethylaminopyrrolidin-1-yl)pyridin-3-yl]-5-ethyl-7-methoxy-4H-benz [d][1,3]oxazin-4-one maleate.
本发明公开了一种苯并[d][1,3]噁嗪衍
生物,其作为药物活性成分时具有优异的稳定性,同时具有优异的溶解性和结晶性。具体公开了2-[2-((S)-3-二甲基
氨基
吡咯烷-1-基)
吡啶-3-基]-5-乙基-7-甲氧基-4H-苯并[d][1,3]噁嗪-4-酮
马来酸盐。