InChI=1S/C12H16O6/c1-6-5-8(14)9(17-7(2)13)3-4-10-11(18-10)12(15)16-6/h3-4,6,8-11,14H,5H2,1-2H3/b4-3+/t6-,8-,9-,10+,11+/m1/s1