InChI=1/C18H18N2O4S/c1-12-7-9-14(10-8-12)25(23,24)19-13(2)18(22)20-11-17(21)15-5-3-4-6-16(15)20/h3-11,13,19,21H,1-2H3/t13-/m0/s1 7B4BECE8ED8E3B5F