InChI=1S/C25H31NO3/c1-17-6-5-7-18(12-17)13-20-14-21(16-26-25(20)27)19-10-11-23(28-2)24(15-19)29-22-8-3-4-9-22/h5-7,10-12,15,20-22H,3-4,8-9,13-14,16H2,1-2H3,(H,26,27)/t20-,21-/m1/s1