InChI=1/C11H7ClN4O4S/c12-7-2-1-5(3-8(7)16(19)20)13-4-6-9(17)14-11(21)15-10(6)18/h1-4,13H,(H2,14,15,17,18,21)/f/h14-15H 6EAE874E7D68B6B6