InChI=1S/C21H21N3O4S/c1-16-5-11-20(12-6-16)29(26,27)24(18-7-9-19(28-2)10-8-18)15-21(25)23-17-4-3-13-22-14-17/h3-14H,15H2,1-2H3,(H,23,25)