发明人徐明华,沈红梅,钱学锋. "Method for the Synthesis of 9-Methoxy-7-oxo-7H-furo[3,2-g]chromene-4-sulfonic acid" [P]. 中国发明专利, 专利号 CN 109979817 B, 授权公告日 2019-12-02.
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