InChI=1S/C21H25N3O3/c1-4-21(2,3)18-14(13-8-7-12(25)10-15(13)22-18)11-16-20(27)24-9-5-6-17(24)19(26)23-16/h4,7-8,10,16-17,22,25H,1,5-6,9,11H2,2-3H3,(H,23,26)/t16-,17-/m0/s1