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In page Bernhard Tollens:
"Unable to resist the call of Wöhler, his former professor, Tollens returned to Göttingen in 1872 and there he remained in various positions until his death in 1918. It was during this final time in Göttingen that he started his work on carbohydrates, which yielded structures of several sugars, the Tollens reagent, and most of his publications.
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