InChI=1S/C17H18N2O5/c20-13-3-1-11(2-4-13)5-7-18-8-6-12-9-14(16(21)22)19-15(10-12)17(23)24/h1-4,6,8-9,15,19-20H,5,7,10H2,(H,21,22)(H,23,24)/b12-6-,18-8-