InChI=1S/C23H21N3O4S/c1-3-31(27,28)18-10-11-21(29-2)20(14-18)26-23-25-15-22(30-23)17-8-6-7-16(13-17)19-9-4-5-12-24-19/h4-15H,3H2,1-2H3,(H,25,26)