Hydrochlorothiazide Nitroso Impurity 77

6-chloro-N- ((6-chloro-1,1-dioxido-7-sulfamoyl-2,3-dihydro-4H-benzo[e][1,2,4]thiadiazin-4-yl) methyl) -4-nitroso-3,4-dihydro-2H-benzo[e][1,2,4]thiadiazine-7-sulfonamide 1,1-dioxide