发明人刘建华,郭海燕,徐明华. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 108905907 A, 授权公告日 2022-06-16.
发明人沈红梅,韩伟,赵玉洁. "Method for the Synthesis of 2-(2-(4-Benzylpiperazin-1-yl)ethyl)-7-nitro-2H-benzo[b][1,4]oxazin-3(4H)-one" [P]. 中国发明专利, 专利号 CN 112221713 B, 授权公告日 2015-05-25.
发明人杨光,罗永刚,何建平. "A Process for Preparing High-Purity 2-(2-(4-Benzylpiperazin-1-yl)ethyl)-7-nitro-2H-benzo[b][1,4]oxazin-3(4H)-one" [P]. 中国发明专利, 专利号 CN 111408338 B, 授权公告日 2019-04-06.
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