InChI=1S/C17H20O12/c18-8-9(19)11(13(21)22)28-15(10(8)20)29-12(14(23)24)17(27,16(25)26)6-7-4-2-1-3-5-7/h1-5,8-12,15,18-20,27H,6H2,(H,21,22)(H,23,24)(H,25,26)