InChI=1S/C26H30O4/c1-14(2)6-8-17-11-20-23(12-22(17)27)29-13-21-19-10-16(5)24(28)18(9-7-15(3)4)25(19)30-26(20)21/h6-7,10-12,21,26-28H,8-9,13H2,1-5H3/t21-,26-/m0/s1