InChI=1S/C15H18N2O7S/c1-8(2)15(3)14(20)16-12(17-15)11-6-9(7-24-25(21,22)23)4-5-10(11)13(18)19/h4-6,8H,7H2,1-3H3,(H,18,19)(H,16,17,20)(H,21,22,23)