Fischer A B, Kumar R, Williams B T. "Method for the Synthesis of Thieno[3,2-b]thiophene-2-carbohydrazide" [P]. US Patent, US 11731664 B2, 2024-11-01.
Stevens L M, Roberts E F, Park J H. "A Process for Preparing High-Purity Thieno[3,2-b]thiophene-2-carbohydrazide" [P]. US Patent, US 11620940 B2, 2023-08-18.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chemosphere, 2010, 1873, (2), 9718-9738.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2010, 1994, 8941-8952.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of Thieno[3,2-b]thiophene-2-carbohydrazide Using HRMS and NMR". J. Pharm. Biomed. Anal., 2011, 2048, (7), 4293-4317.