Tran HTC, Lu TP, Nguyen UK, et al. DEVELOPMENT AND VALIDATION OF LC-MS/MS FOR ANALYZING POTENTIAL GENOTOXIC IMPURITY ETHYL-(E/Z)-3-(2- CARBETHOXY-2-CYANOETHENYL) AMINO-1H-PYRAZOL-4- CARBOXYLAT IN ALLOPURINOL. CTJUMP. 2023;(69):164-171. doi:10.58490/ctump.2023i69.976