InChI=1S/C17H18N2O4/c1-12(13-6-4-3-5-7-13)19-11-18-10-14(19)15(20)23-17(8-9-17)16(21)22-2/h3-7,10-12H,8-9H2,1-2H3/t12-/m1/s1