TY - GEN AU - Li,Min AU - Lin,Mingxiang AU - Rustum,Abu TI - Application of LC-MS(n) in conjunction with mechanism-based stress studies in the elucidation of drug impurity structure: rapid identification of a process impurity in betamethasone 17-valerate drug substance SN - 0731-7085 PY - 2009///0423 KW - Anti-Inflammatory Agents KW - analysis KW - Betamethasone Valerate KW - Chemistry, Pharmaceutical KW - Chromatography, Liquid KW - methods KW - Dexamethasone KW - Drug Contamination KW - Drug Stability KW - Mass Spectrometry KW - Molecular Structure KW - Pharmaceutical Preparations KW - Spectrophotometry, Ultraviolet KW - Stereoisomerism KW - Technology, Pharmaceutical KW - Time Factors N1 - Publication Type: Journal Article UR - https://doi.org/10.1016/j.jpba.2008.09.021 ER -