InChI=1S/C21H26O14/c22-11(23)6-5-8-3-1-2-4-9(8)33-21-17(29)13(25)12(24)10(34-21)7-32-20-16(28)14(26)15(27)18(35-20)19(30)31/h1-6,10,12-18,20-21,24-29H,7H2,(H,22,23)(H,30,31)/b6-5+