![](http://www.alamy.com/thumbs/6/009776FC-EE2E-4746-B737-075BD93FE251/2HFGNM9.jpg)
Tetrahydrobiopterin (sapropterin) phenylketonuria drug molecule. Cofactor to a number of aromatic amino acid hydroxylase enzymes. Skeletal formula.
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Keywords: acid, amino, atoms, background, bh4, biopterin, chemical, chemistry, cofactor, composition, compound, drawing, flat, formula, hydroxylase, hyperphenylalaninemia, icon, isolated, line, molecular, molecule, nitric, oxide, phenylalanine, phenylketonuria, sapropterin, skeletal, structure, tetrahydrobiopterin, thb, vector, vectors, white