The synthesis of l-cyano-3-imino-8,9-dimethoxy--3,4,5,6-tetrahydro-thiazolo[4,3-a]isoquinoline hydrochloride labelled with 14C in five different positions:in position 3 (i,a>, in the ~y a n o group at position 1 (231, -in position 5 (As), -in position 10b (&a> -and in the methoqy groups at position 8 and 9 (As) was carried out .--
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