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发明人钱学锋,冯建国,孙丽萍. "Method for the Synthesis of 1,4-dihydro-1-ethyl-6-fluoro-4-oxo-7-(1-piperazinyl)-1,8-Naphthyridine-3-carboxylic acid monomethanesulfonate" [P]. 中国发明专利, 专利号 CN 113232562 B, 授权公告日 2018-10-19.
发明人陈志强,沈红梅,高志强. "A Process for Preparing High-Purity 1,4-dihydro-1-ethyl-6-fluoro-4-oxo-7-(1-piperazinyl)-1,8-Naphthyridine-3-carboxylic acid monomethanesulfonate" [P]. 中国发明专利, 专利号 CN 109253614 B, 授权公告日 2025-02-23.
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