InChI=1S/C15H22O8/c16-8-6-4-2-1-3-5-7-9-22-15-12(19)10(17)11(18)13(23-15)14(20)21/h3-6,8,10-13,15,17-19H,1-2,7,9H2,(H,20,21)/b5-3-,6-4+