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发明人马晓峰,罗永刚,钱学锋. "Method for the Synthesis of 3-Hydroxy-5-methoxy-7-methyl-2,3-dihydro-1h-indol-2-one" [P]. 中国发明专利, 专利号 CN 116156731 B, 授权公告日 2020-07-06.
发明人刘建华,高志强,唐晓军. "A Process for Preparing High-Purity 3-Hydroxy-5-methoxy-7-methyl-2,3-dihydro-1h-indol-2-one" [P]. 中国发明专利, 专利号 CN 117165257 B, 授权公告日 2025-07-07.
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