InChI=1S/C23H26O5/c1-6-13(2)9-14(3)7-8-17-10-16-11-19(25)23(5)21(18(16)12-27-17)20(15(4)24)22(26)28-23/h7-13,20-21H,6H2,1-5H3/b8-7+,14-9+/t13-,20?,21?,23-/m0/s1