21083-47-6 4-imidazolidinone, 5,5-diphenyl-2-thioxo- 5,5-diphenyl-2-thiohydantoin 5,5-diphenyl-2-thioxoimidazolidin-4-one InChI=1/C15H12N2OS/c18-13-15(17-14(19)16-13,11-7-3-1-4-8-11)12-9-5-2-6-10-12/h1-10H,(H2,16,17,18,19