Roberts E F, Park J H, Hughes D C. "Method for the Synthesis of 4,7-Dihydroxy-3,9-dimethoxy-1-methyl-6H-benzo[c]chromen-6-one" [P]. US Patent, US 11281011 B2, 2016-03-23.
发明人张德明,陈志强,徐明华. "A Process for Preparing High-Purity 4,7-Dihydroxy-3,9-dimethoxy-1-methyl-6H-benzo[c]chromen-6-one" [P]. 中国发明专利, 专利号 CN 112990303 A, 授权公告日 2018-08-14.
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