Metabolic TV-oxidation of atropine, hyoscine and the corresponding nor-alkaloids by guinea-pig liver microsomal preparations

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Abstract
Incubation of guinea-pig liver microsomal preparations with atropine or hyoscine resulted in the formation of the corresponding nor-alkaloids and both isomers of atropine N-oxide from atropine and one isomer of hyoscine N-oxide from hyoscine. Separate incubations of guinea-pig liver microsomal preparations with nor-atropine and nor-hyoscine yielded the corresponding hydroxylamines. The N-oxide and hydroxylamine metabolites were identified by comparison of their t.l.c. behaviour and m.s. with prepared compounds and also by their reduction to the corresponding tertiary or secondary amines.