2H-1,2,4-Benzothiadiazine-7-sulfonamide, 6-chloro-3,4-dihydro-2-methyl-3-((2-propenylthio)methyl)-, 1,1-dioxide 3-(Allylthiomethyl-6-chlor-3,4-dihydro-2-methyl-7-sulfamoyl-2H-1,2,4-benzothiadiazixin 1,1-dioxid 5611-64-3 Methalthiazide Methalthiazide [USAN] NSC 352522 NSC352522 P 2530