InChI=1S/C17H22N2O7/c20-12-13(21)15(16(23)24)26-17(14(12)22)25-8-4-3-7-11-18-9-5-1-2-6-10(9)19-11/h1-2,5-6,12-15,17,20-22H,3-4,7-8H2,(H,18,19)(H,23,24)