InChI=1/C22H20N2O4/c1-25-18-12-15(13-19(26-2)21(18)27-3)23-22-24-17-11-7-10-16(20(17)28-22)14-8-5-4-6-9-14/h4-13H,1-3H3,(H,23,24)/f/h23H 312BE12E8DCD13A5