InChI=1S/C14H19NO5S/c1-3-11(9-16)13(14(17)18)8-15-21(19,20)12-6-4-10(2)5-7-12/h4-7,9,11,13,15H,3,8H2,1-2H3,(H,17,18)/t11-,13-/m1/s1