InChI=1S/C14H16N2O3/c17-10-7-12-13(18)15-11(14(19)16(12)8-10)6-9-4-2-1-3-5-9/h1-5,10-12,17H,6-8H2,(H,15,18)/t10-,11+,12-/m1/s1