InChI=1S/C26H28O3/c1-25(2)11-12-26(3,4)22-15-19(9-10-21(22)25)23(27)18-7-5-17-14-20(24(28)29)8-6-16(17)13-18/h5-10,13-15,23,27H,11-12H2,1-4H3,(H,28,29)/t23-/m0/s1