InChI=1S/C15H20O5/c1-14(2)8-4-3-7-6-19-12-11(7)15(8,13(18)20-12)10(17)5-9(14)16/h3,8-12,16-17H,4-6H2,1-2H3/t8-,9+,10-,11+,12+,15-/m0/s1