<unk>  <unk>  is a precursor in the production of thyroid hormone, and results from iodization of monoiodotyrosine at the other meta- position on the phenol ring.
Diiodotyrosine
7-Dehydrocholesterol
Ramogen
Hypophosphorous acid
Triethanolamine
Choline c-11
Tetrahydrofolic acid
Tetrahydrobiopterin