发明人王建平,杨光,马晓峰. "一种4-(2-aminoethyl)-3-ethyl-1-[(2-methylphenyl)methyl]-4,5-dihydro-1H-pyrazol-5-one的合成方法" [P]. 中国发明专利, 专利号 CN 111769451 A, 授权公告日 2024-07-14.
发明人郑宇鹏,黄志刚,冯建国. "Method for the Synthesis of 4-(2-aminoethyl)-3-ethyl-1-[(2-methylphenyl)methyl]-4,5-dihydro-1H-pyrazol-5-one" [P]. 中国发明专利, 专利号 CN 117684176 B, 授权公告日 2019-02-25.
发明人何建平,林芳,韩伟. "A Process for Preparing High-Purity 4-(2-aminoethyl)-3-ethyl-1-[(2-methylphenyl)methyl]-4,5-dihydro-1H-pyrazol-5-one" [P]. 中国发明专利, 专利号 CN 115637413 A, 授权公告日 2025-09-19.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of 4-(2-aminoethyl)-3-ethyl-1-[(2-methylphenyl)methyl]-4,5-dihydro-1H-pyrazol-5-one in Pharmaceutical Formulations". Talanta, 2011, 1054, (6), 5141-5164.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of 4-(2-aminoethyl)-3-ethyl-1-[(2-methylphenyl)methyl]-4,5-dihydro-1H-pyrazol-5-one as an Impurity". J. Agric. Food Chem., 2013, 963, (7), 8562-8589.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 4-(2-aminoethyl)-3-ethyl-1-[(2-methylphenyl)methyl]-4,5-dihydro-1H-pyrazol-5-one Using HRMS and NMR". J. Pharm. Biomed. Anal., 2022, 2150, 2020-2035.