InChI=1S/C17H20O11/c18-9(19)7-17(16(25)26,6-8-4-2-1-3-5-8)28-15-12(22)10(20)11(21)13(27-15)14(23)24/h1-5,10-13,15,20-22H,6-7H2,(H,18,19)(H,23,24)(H,25,26)