InChI=1S/C15H16N2O5/c18-11(6-12(19)20)14-13-8(5-10(17-14)15(21)22)7-3-1-2-4-9(7)16-13/h1-4,10-11,14,16-18H,5-6H2,(H,19,20)(H,21,22)