Nowak P, Björnsson E, Sørensen M. "一种的合成方法" [P]. European Patent, EP 3832765 A1, 2023-09-13.
发明人徐明华,林芳,韩伟. "Method for the Synthesis of 4-(2-(3-(1-(5-Carboxypentyl)-3,3-dimethyl-5-sulfoindolin-2-ylidene)prop-1-en-1-yl)-3,3-dimethyl-5-sulfo-3H-indol-1-ium-1-yl)butane-1-sulfonate" [P]. 中国发明专利, 专利号 CN 116497468 B, 授权公告日 2022-06-04.
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