Stevens L M, Hughes D C, Brown S R. "一种的合成方法" [P]. US Patent, US 10261405 B2, 2024-02-16.
发明人李文辉,王建平,唐晓军. "Method for the Synthesis of 7,8-Dimethoxy-3H-pyrimido[5,4-b]indole-4(5H)-thione" [P]. 中国发明专利, 专利号 CN 110447863 B, 授权公告日 2017-06-12.
发明人朱建伟,郭海燕,胡光. "A Process for Preparing High-Purity 7,8-Dimethoxy-3H-pyrimido[5,4-b]indole-4(5H)-thione" [P]. 中国发明专利, 专利号 CN 113167522 A, 授权公告日 2024-07-26.
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