InChI=1S/C17H20N2O5S/c1-8(9-4-6-10(20)7-5-9)13(21)18-11-14(22)19-12(16(23)24)17(2,3)25-15(11)19/h4-8,11-12,15,20H,1-3H3,(H,18,21)(H,23,24)/t8-,11-,12+,15-/m1/s1