InChI=1S/C30H32O8/c1-20(19-37-29(35)15-10-21-8-11-24(32)12-9-21)4-2-5-22(18-31)6-3-7-23-16-28(38-30(23)36)26-17-25(33)13-14-27(26)34/h4,6,8-17,28,31-34H,2-3,5,7,18-19H2,1H3/b15-10-,20-4+,22-6-/t28-/m1/s1