发明人郭海燕,何建平,周伟. "Method for the Synthesis of 4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrazine-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 114934545 B, 授权公告日 2015-07-02.
发明人周伟,张德明,朱建伟. "A Process for Preparing High-Purity 4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrazine-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 111128911 A, 授权公告日 2019-12-25.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Nat. Prod., 2015, 1249, 2289-2310.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2021, 2187, (11), 6415-6423.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrazine-3-carbonitrile Using HRMS and NMR". Phytochemistry, 2010, 2189, 372-377.