N,N'-dimethyl-5-hydroxy-5-(2-cyclohexyl-1-vinylethyl)hydantoin

N,N'-dimethyl-5-hydroxy-5-(3-hydroxy-1-vinylpropyl)hydantoin

(E)-N,N'-dimethyl-5-hydroxy-5-(5-phenyl-2-pentenyl)hydantoin

N,N'-dimethyl-5-hydroxy-5-(3-hydroxy-3-methyl-1,1-diphenylbutyl)hydantoin