InChI=1S/C22H24N2O4/c1-15-18(13-21(23)25)19-12-17(28-11-5-8-22(26)27)9-10-20(19)24(15)14-16-6-3-2-4-7-16/h2-4,6-7,9-10,12H,5,8,11,13-14H2,1H3,(H2,23,25)(H,26,27)