Roberts E F, Davis P L, Chen K W. "一种的合成方法" [P]. US Patent, US 11960965 B2, 2020-04-26.
发明人郑宇鹏,孙丽萍,黄志刚. "Method for the Synthesis of 3',6'-Dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one, potassium salt" [P]. 中国发明专利, 专利号 CN 110658347 A, 授权公告日 2015-06-26.
发明人黄志刚,马晓峰,胡光. "A Process for Preparing High-Purity 3',6'-Dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one, potassium salt" [P]. 中国发明专利, 专利号 CN 115070959 A, 授权公告日 2022-06-03.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2014, 1220, 781-788.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2012, 866, (11), 964-991.