InChI=1S/C13H17NO5S/c1-4-5-18-13(17)11-7-20-12(14-11)10(6-15)8(2)19-9(3)16/h4,6-8,10,12,14H,1,5H2,2-3H3/t8-,10-,12+/m1/s1