Johnson M A, O'Brien P Q, Brown S R. "一种的合成方法" [P]. US Patent, US 9515461 B2, 2018-08-05.
发明人罗永刚,黄志刚,郭海燕. "Method for the Synthesis of Ethyl 4-hydroxy-1H-indazole-6-carboxylate" [P]. 中国发明专利, 专利号 CN 116637684 A, 授权公告日 2019-08-28.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2018, 2068, (7), 3524-3548.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2016, 1738, 6972-6982.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 4-hydroxy-1H-indazole-6-carboxylate Using HRMS and NMR". J. Nat. Prod., 2011, 1033, (4), 7025-7053.