Patel M V, Park J H, Yamamoto T. "一种的合成方法" [P]. US Patent, US 11502520 B2, 2017-03-08.
发明人徐明华,冯建国,张德明. "Method for the Synthesis of 261768-88-1
3,19-Dihydroxy-6,23-dioxo-12-ursen-28-oic acid
C30H44O6
W2608" [P]. 中国发明专利, 专利号 CN 115458976 B, 授权公告日 2020-11-11.
参考文献 Literature
Jensen P, Larsen A M, Olsen K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2020, 350, 1189-1195.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2021, 1345, 8115-8126.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 261768-88-1
3,19-Dihydroxy-6,23-dioxo-12-ursen-28-oic acid
C30H44O6
W2608 Using HRMS and NMR". Anal. Methods, 2010, 1972, (7), 1368-1372.