Ibuprofen EP Impurity J

6-Chloro-N-[(6-chloro-7-sulfamoyl-2, 3-dihydro-4H-1, 2, 4-benzothiadiazin-4-yl 1, 1-dioxide)methyl]-3, 4-dihydro-2H-1, 2, 4-benzothiadiazine-7-sulfonamide 1, 1-dioxide ;