InChI=1/C16H20N4O4S/c1-20-15-5-3-4-14(13(15)10-17-20)18-16(21)11-6-8-12(9-7-11)25(22,23)19-24-2/h6-10,14,19H,3-5H2,1-2H3,(H,18,21)/t14-/m1/s1/f/h18H 432327BBF479A408