title: Analysis of thyroid hormones as their heptafluorobutyryl methyl ester derivatives by gas chromatography--mass spectrometry.
mesh_terms: D002849:Chromatography, Gas; D004952:Esters / Q000032:analysis; D006845:Hydrocarbons, Fluorinated / Q000032:analysis; D013058:Mass Spectrometry; D008745:Methylation; D013963:Thyroid Hormones / Q000032:analysis*
chemical_list: D004952:Esters; D006845:Hydrocarbons, Fluorinated; D013963:Thyroid Hormones