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