InChI=1S/C23H23N3O2/c1-15(2)11-12-26-14-16(17-7-4-6-10-21(17)26)13-20-23(28)24-19-9-5-3-8-18(19)22(27)25-20/h3-11,14,20H,12-13H2,1-2H3,(H,24,28)(H,25,27)/t20-/m0/s1