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发明人刘建华,赵玉洁,沈红梅. "Method for the Synthesis of Xanthylium, 9-[2-carboxy-4-[(2-propyn-1-ylamino)carbonyl]phenyl]-3,6-bis(dimethylamino)-, inner salt" [P]. 中国发明专利, 专利号 CN 110892014 B, 授权公告日 2024-04-12.
发明人杨光,周伟,韩伟. "A Process for Preparing High-Purity Xanthylium, 9-[2-carboxy-4-[(2-propyn-1-ylamino)carbonyl]phenyl]-3,6-bis(dimethylamino)-, inner salt" [P]. 中国发明专利, 专利号 CN 109696311 B, 授权公告日 2024-06-22.
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