10H-phenothiazine, 2-chloro-10-methyl-7-nitro-, 5,5-dioxide 2-chloro-10-methyl-7-nitro-10H-phenothiazine 5,5-dioxide InChI=1/C13H9ClN2O4S/c1-15-10-4-3-9(16(17)18)7-13(10)21(19,20)12-5-2-8(14)6-11(12)15/h2-7H,1H