146948-28-9 Ethyl 3-methylcarbamoyl-5,6-dihydrothiazolo(2,3-c)(1,4)thiazine-8-carboxylate Thiazolo(2,3-c)(1,4)thiazine-8-carboxylic acid, 5,6-dihydro-3-((methylamino)carbonyl)-, ethyl ester