InChI=1S/C15H20O6/c1-4-9(2)15(19)21-13-7-8-14(18)20-12(13)6-5-11(17)10(3)16/h4-8,10-13,16-17H,1-3H3/b6-5+,9-4+/t10-,11-,12-,13-/m0/s1