InChI=1S/C14H20O8/c15-7-9-10(17)11(18)12(19)13(22-9)21-6-5-14(20)3-1-8(16)2-4-14/h1-4,9-13,15,17-20H,5-7H2/t9-,10-,11+,12-,13-/m0/s1