✍ Scribed by René Cypres; Bernard Bettens
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## Abstract Three radiolabelled forms of trospectomycin (6′‐n‐propylspectinomycin sulphate hydrate) have been synthesised, namely [8′‐^14^C]‐, [6′,7′‐^3^H]‐, and [5′,6′,7′‐^3^H]‐trospectomycin. Although all three forms of the drug are metabolically stable and therefore suitable for use in animal st
\({ }^{3} \mathrm{H}\) and \({ }^{14} \mathrm{C}\)-Sch 27899 have been prepared by fermentation using the Micromonospora carbonacea organism. In the case of \({ }^{3} \mathrm{H}\)-Sch 27899 , the label was incorporated by a single addition of \(100 \mathrm{mCi}\) of \(70 \mathrm{Ci} / \mathrm{mmole}
A m s t e r d a m -THE NETHERLANDS. R e c e i v e d on November 3. 1 9 7 0 . SUMMARY P r o c e d u r e s a r e g i v e n f o r t h e p r e p a r a t i o n of ( 2 -" C / , I?-' H I n a p h t h a l e n e , ( 1 -' C / , I ?-3 H I n a p h t h a l e n e , I. 2.3.4t e t r a h y d r o -( Z -" C ) , ( ? -'