InChI=1S/C22H23N3O2/c26-22(20-13-17-5-1-2-6-19(17)27-20)24-21-16-7-10-25(11-8-16)18(21)12-15-4-3-9-23-14-15/h1-6,9,13-14,16,18,21H,7-8,10-12H2,(H,24,26)/t18-,21+/m0/s1