Sørensen M, Jørgensen K, Mueller T C. "一种的合成方法" [P]. European Patent, EP 3697237 A1, 2021-07-03.
Hughes D C, Johnson M A, Chen K W. "Method for the Synthesis of 1,3-Dioxo-7-(4-phenoxybenzyl)hexahydroimidazo[1,5-a]pyrazin-2(3H)-yl 4-(4-methoxyphenyl)piperazine-1-carboxylate" [P]. US Patent, US 10433509 B2, 2024-07-27.
Johnson M A, Yamamoto T, Schröder R. "A Process for Preparing High-Purity 1,3-Dioxo-7-(4-phenoxybenzyl)hexahydroimidazo[1,5-a]pyrazin-2(3H)-yl 4-(4-methoxyphenyl)piperazine-1-carboxylate" [P]. US Patent, US 9957578 B2, 2025-10-18.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2012, 1337, 764-786.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2017, 1660, 392-400.
Garcia M, Rodriguez P. "Identification and Structural Characterization of a Novel Degradation Product of 1,3-Dioxo-7-(4-phenoxybenzyl)hexahydroimidazo[1,5-a]pyrazin-2(3H)-yl 4-(4-methoxyphenyl)piperazine-1-carboxylate Using HRMS and NMR". J. Chromatogr. A, 2025, 1588, (2), 1113-1137.