InChI=1S/C15H16O9/c16-9-4-1-6-5-7(2-3-8(6)23-9)22-15-12(19)10(17)11(18)13(24-15)14(20)21/h2-3,5,10-13,15,17-19H,1,4H2,(H,20,21)