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2Z. Karczmarzyk.
Keto-enol tautomerism in crystals of 3-[hydroxy(phenyl)methyl]-2,5,7-trimethyl-2,3-dihydropyrido[3,2-e][1,2]thiazin-4-one 1,1-dioxide and 3-(1-hydroxyethylidene)-2,5,7-trimethyl-2,3-dihydropyrido[3,2-
e][1,2]thiazin-4-one 1,1-dioxide, Acta Cryst. (2008). C64, o590-o594Â Â Â Â