InChI=1S/C21H26N2O3/c1-26-17(25)14-11-19-7-4-9-23-10-8-20(18(19)23)13-5-2-3-6-15(13)22-21(14,20)12-16(19)24/h2-3,5-6,14,16,18,22,24H,4,7-12H2,1H3