InChI=1S/C14H20O5S/c1-12(15)6-5-9-14(11-19-20(16,17)18)10-13-7-3-2-4-8-13/h2-4,7-8,10,12,15H,5-6,9,11H2,1H3,(H,16,17,18)/b14-10-