oxyen ox oxa- and thia-porphyrin oxalyl-co A decarboxylase oxothiazolidine carboxylate oxyphenylsulfonic acid test oxophenarsine hydrochloride Oxyquinoline Sulfathalidine Oxtropis ochrocephala Bunge oxyphosphate of zinc cement oxytetracycline dihyclorate Oxybenzone and dioxybenzone