1-IMIDAZOLIDINECARBOXYLIC ACID, 2,5-DIOXO-4,4-DIPHENYL-, ETHYL ESTER 1097-57-0 3-Ethoxycarbonyl-5,5-diphenyl hydantoin 5-24-08-00381 (Beilstein Handbook Reference) BRN 0762005 P 6127