发明人张德明,冯建国,周伟. "Method for the Synthesis of Methyl 3-(2-ethyl-6-oxo-4-(trifluoromethyl)-2H-pyrazolo[3,4-b]pyridin-7(6H)-yl)propanoate" [P]. 中国发明专利, 专利号 CN 116335405 B, 授权公告日 2015-12-28.
发明人何建平,张德明,韩伟. "A Process for Preparing High-Purity Methyl 3-(2-ethyl-6-oxo-4-(trifluoromethyl)-2H-pyrazolo[3,4-b]pyridin-7(6H)-yl)propanoate" [P]. 中国发明专利, 专利号 CN 109825967 A, 授权公告日 2017-01-05.
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