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发明人高志强,何建平,钱学锋. "Method for the Synthesis of 2-(Ethylthio)-3-(2-methoxyethyl)-3,5-dihydro-4H-pyrimido[5,4-b]indol-4-one" [P]. 中国发明专利, 专利号 CN 108260430 A, 授权公告日 2025-02-01.
发明人韩伟,胡光,黄志刚. "A Process for Preparing High-Purity 2-(Ethylthio)-3-(2-methoxyethyl)-3,5-dihydro-4H-pyrimido[5,4-b]indol-4-one" [P]. 中国发明专利, 专利号 CN 116854259 A, 授权公告日 2021-09-08.
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