InChI=1S/C20H21N3O3S/c1-16-13-18(23-27(24,25)20-5-3-2-4-6-20)15-19(14-16)26-12-11-22-17-7-9-21-10-8-17/h2-10,13-15,23H,11-12H2,1H3,(H,21,22)/p+1