InChI=1S/C24H31NO3/c1-18-7-9-20(10-8-18)23(26)28-21-13-11-19(12-14-21)22(17-25(2)3)24(27)15-5-4-6-16-24/h7-14,22,27H,4-6,15-17H2,1-3H3