InChI=1S/C21H25N3O2/c1-13(2)9-10-17-15(14-6-3-4-7-16(14)22-17)12-18-21(26)24-11-5-8-19(24)20(25)23-18/h3-4,6-7,9,18-19,22H,5,8,10-12H2,1-2H3,(H,23,25)/t18-,19-/m0/s1