InChI=1S/C21H25N3O2/c22-18(14-16-8-3-1-4-9-16)21(26)24-13-7-12-19(24)20(25)23-15-17-10-5-2-6-11-17/h1-6,8-11,18-19H,7,12-15,22H2,(H,23,25)/t18-,19+/m1/s1