InChI=1/C16H16N2O3/c19-15(12-3-1-2-4-13(12)16(20)21)18-11-5-6-14-10(9-11)7-8-17-14/h1-2,5-9,12-13,17H,3-4H2,(H,18,19)(H,20,21)/p-1/t12-,13-/m1/s1/fC16H15N2O3/h18H/q-1 56E419554F1CA864