InChI=1S/C16H21NO5S/c1-3-15(18)16(22-23(19,20)21)12-6-4-5-10-14-11-8-7-9-13(2)17-14/h4-10,16H,3,11-12H2,1-2H3,(H,19,20,21)/b6-4+,10-5-