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