Chemical Name: Potassium 6-methyl-1,2,3-oxathiazin-4-olate 2,2-dioxide (as per EP); 6-Methyl-1,2,3-oxathiazine-4(3H)-one-2,2-dioxide potassium salt (as per USP)
Synonym: Lansoprazole Sulfide Des(trifluoroethyl) Impurity
Smile: O=[S](NC1=O)(OC(C)=C1)=O.[K]