Lansoprazole Impurity: 1-Methyl-12-thioxopyrido[1,2:3,4]imidazo-[1,2-a]benzimidazol-2

Lansoprazole Impurity: 1-Methyl-12-thioxopyrido[1,2:3,4]imidazo-[1,2-a]benzimidazol-2(12H)-one.

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