InChI=1/C19H20N2O6/c1-9(2)26-17(23)14-15(20)27-10(3)13(16(22)25-4)19(14)11-7-5-6-8-12(11)21-18(19)24/h5-9H,20H2,1-4H3,(H,21,24)/t19-/m1/s1/f/h21H C44DA16E20D30174