InChI=1S/C13H16N2O4S2/c1-20-13(6-16)11(19)14-12(10(18)15-13)5-7-3-2-4-8(17)9(7)21-12/h2-4,8-9,16-17H,5-6H2,1H3,(H,14,19)(H,15,18)/t8-,9-,12+,13+/m0/s1