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In a study using 14C-D-penicillamine in a normal subject only 50% of the D-penicillamine was absorbed from the gut. The major urinary metabolites are cysteine-penicillamine and penicillamine disulphide. S-methyl-D-penicillamine is the only biochemically transformed metabolite so far identified.
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David I. Perrett (1977) studied this question.
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