InChI=1S/C17H20N2O5/c20-11-14-13(21)10-16(24-14)19-9-7-15(22)18(17(19)23)8-6-12-4-2-1-3-5-12/h1-5,7,9,13-14,16,20-21H,6,8,10-11H2/t13-,14+,16+/m0/s1