InChI=1S/C14H16O7/c15-9(7-2-1-3-8(6-7)13(18)19)4-5-10-11(16)12(17)14(20)21-10/h1-3,6,10-12,14,16-17,20H,4-5H2,(H,18,19)/t10-,11-,12-,14?/m1/s1