InChI=1S/C16H22O7/c1-2-3-4-5-6-7-8-9-10-22-16-13(19)11(17)12(18)14(23-16)15(20)21/h2-4,6-9,11-14,16-19H,1,5,10H2,(H,20,21)/b4-3-,7-6-,9-8+