2,4-Imidazolidinedione, 5,5-diphenyl-3-(2-propynyl)- 2718-07-2 4-24-00-01750 (Beilstein Handbook Reference) 5,5-Diphenyl-3-(2-propynyl)hydantoin BRN 0277780 Hydantoin, 5,5-diphenyl-3-(2-propynyl)-