Oxygenation of pioglitazone-7V-oxide by a microorganism isolated from soil was accompanied by iV-deoxygenation to produce the pioglitazone metabolites 5-[4-[2-[5-(l-hydroxyethyl)-2pyridyl]ethoxy]benzyl]-2,4-thiazolidinedione and 5-[4-[2-(5-acetyl-2-pyridyl)ethoxy]benzyl]-2,4thiazolidinedione. The oxygenating/deoxygenating organism has been characterized as Streptomyces hygroscopicus strain 02179 (UC 1 1099). The culture has been deposited with Agricultural Research Service, USDA,with accession number NRRL18975.
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