InChI=1S/C21H28N2O2/c1-4-15-14-8-10-22-11-9-21(20(15)22)16-6-5-7-17(25-3)19(16)23(13(2)24)18(21)12-14/h5-7,14-15,18,20H,4,8-12H2,1-3H3