InChI=1S/C28H34O4/c1-17(2)10-9-11-20-14-15-22(21-12-7-6-8-13-21)23(16-20)27(31)24-26(30)18(3)25(29)19(4)28(24)32-5/h6-8,10,12-14,22-23,29-30H,9,11,15-16H2,1-5H3/t22-,23+/m1/s1