Klinger H, Lee S K, Patel M V. "Method for the Synthesis of 4-[(E)-2-(2,3-Dimethoxyphenyl)ethenyl]-1-ethylpyridin-1-ium iodide" [P]. US Patent, US 9770544 B2, 2020-02-12.
发明人张德明,钱学锋,韩伟. "A Process for Preparing High-Purity 4-[(E)-2-(2,3-Dimethoxyphenyl)ethenyl]-1-ethylpyridin-1-ium iodide" [P]. 中国发明专利, 专利号 CN 110809530 A, 授权公告日 2016-12-02.
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