发明人王建平,林芳,沈红梅. "Method for the Synthesis of 2-(3-(2-Chloro-4-(chlorosulfonyl)phenyl)ureido)pyridin-1-ium hydrogen sulfate" [P]. 中国发明专利, 专利号 CN 109220548 B, 授权公告日 2024-01-07.
Johnson M A, Fischer A B, Anderson J P. "A Process for Preparing High-Purity 2-(3-(2-Chloro-4-(chlorosulfonyl)phenyl)ureido)pyridin-1-ium hydrogen sulfate" [P]. US Patent, US 10705463 B2, 2015-10-03.
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