Then, through the action of catechol 2,3-dioxygenase, through the intermediate or ortho way, it decomposes and decomposes the ring; it synthesizes myurfuric acid or myurfuric acid semialdehyde to form direct chain carboxylic acid, which is then oxidized gradually through the citric acid cycle, and finally becomes carbon dioxide and water. Naphthalene and phenanthrene are metabolized by hydroxylation and dihydrodihydrodihydroxylation, and phenanthrene is decomposed to form 3,4-dihydroxyphenanthrene<br>
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