InChI=1S/C18H26O12/c19-9(3-8-4-10(20)6-11(21)5-8)1-2-12(22)28-7-29-18-15(25)13(23)14(24)16(30-18)17(26)27/h4-6,9,13-21,23-27H,1-3,7H2