InChI=1S/C14H20O5/c1-4-6-11-9(8-10(15)14(17)18-3)13(16)12(19-11)7-5-2/h4-8,10-13,15-16H,1-3H3/b6-4+,7-5+,9-8-/t10-,11-,12+,13+/m1/s1