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