InChI=1/C20H18N2O4/c1-26-20(23)16-10-5-9-14-12-7-4-8-13(12)18(21-19(14)16)15-6-2-3-11-17(15)22(24)25/h2-7,9-13,18,21H,8H2,1H3/t12-,13-,18+/m1/s1 6242288499A30110