发明人郭海燕,沈红梅,何建平. "Method for the Synthesis of 2-Oxo-3,4-dihydro-2H-1,3-benzoxazine-6-sulfonyl chloride" [P]. 中国发明专利, 专利号 CN 115418652 B, 授权公告日 2015-04-20.
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