2,4-Imidazolidinedione, 5,5-bis(4-hydroxyphenyl)- 5,5-Bis(4-hydroxyphenyl)-2,4-imidazolidinedione 5,5-Bis(4-hydroxyphenyl)hydantoin 5,5-Bis(p-hydroxyphenyl)hydantoin 60348-77-8 p-Hydroxyphenytoin