Sulphoxide metabolites of thioridazine in man

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Abstract
1. Chromatograms of urine extracts from patients taking thioridazine contain several different sulphoxide metabolites. Some of these have not hitherto been described or identified. 2. Two of the unknown metabolites appear, from chemical tests and mass spectro-metry, to be isomers of the already known thioridazine ring-sulphoxide and sulphoridazine ring-sulphoxide from which they can be produced by treatment with trifluoroacetic anhydride. 3. Two others appear, by similar identification tests and i.r. analysis, to be lactams of mesoridazine ring-sulphoxide and of sulphoridazine ring-sulphoxide.