发明人赵玉洁,郭海燕,唐晓军. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 113822260 A, 授权公告日 2018-05-07.
发明人张德明,陈志强,孙丽萍. "Method for the Synthesis of (R)-Ethyl 2-(4-amino-6-nitrochroman-4-yl)-2,2-difluoroacetate hydrochloride" [P]. 中国发明专利, 专利号 CN 114219050 A, 授权公告日 2019-09-22.
发明人李文辉,郭海燕,高志强. "A Process for Preparing High-Purity (R)-Ethyl 2-(4-amino-6-nitrochroman-4-yl)-2,2-difluoroacetate hydrochloride" [P]. 中国发明专利, 专利号 CN 116964649 B, 授权公告日 2016-09-21.
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