Chemical Name: (1R,2R)-1-(3,4-dimethoxybenzyl)-2-(3-((5-hydroxypentyl)oxy)-3-oxopropyl)-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolin-2-ium iodide
Synonym: Esomeprazole EP Impurity A ; Omeprazole EP Impurity A ; 5-Methoxy-1H-benzimidazole-2-thiol ;