InChI=1/C18H20N2O4/c1-12(20-18(23)14-6-4-3-5-7-14)17(22)19-11-13-8-9-15(21)16(10-13)24-2/h3-10,12,21H,11H2,1-2H3,(H,19,22)(H,20,23)/t12-/m0/s1/f/h19-20H	684846F6E8AE8358