InChI=1S/C15H18N2O7S/c1-7(2)15(4)14(20)16-12(17-15)10-9(13(18)19)6-5-8(3)11(10)24-25(21,22)23/h5-7H,1-4H3,(H,18,19)(H,16,17,20)(H,21,22,23)