InChI=1S/C22H23N3O3/c1-2-20(28-19-6-4-18(5-7-19)25-11-9-23-15-25)14-24(10-1)13-17-3-8-21-22(12-17)27-16-26-21/h3-9,11-12,15,20H,1-2,10,13-14,16H2/t20-/m0/s1