发明人郭海燕,沈红梅,张德明. "Method for the Synthesis of 2-Hydroxy-4-(3-nitrobenzenesulfonamido)benzoic acid" [P]. 中国发明专利, 专利号 CN 112292811 A, 授权公告日 2021-12-19.
发明人黄志刚,郑宇鹏,罗永刚. "A Process for Preparing High-Purity 2-Hydroxy-4-(3-nitrobenzenesulfonamido)benzoic acid" [P]. 中国发明专利, 专利号 CN 112041448 B, 授权公告日 2020-06-22.
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