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  Heterocyclic Chemistry - John A. Joule, Keith Mills - Google Books

  https://books.google.de/books?id=8GKNcXCKNzAC&pg=PA451#v=onepage

  This book has so closely matched the requirements of its readership over the years that it has become the first choice for chemists worldwide. Heterocyclic chemistry comprises at least half of all organic chemistry research worldwide. In particular, the…

• 

  Heterocyclic Chemistry - John A. Joule, Keith Mills - Google Books

  https://books.google.de/books?id=8GKNcXCKNzAC&pg=PA380#v=onepage

  This book has so closely matched the requirements of its readership over the years that it has become the first choice for chemists worldwide. Heterocyclic chemistry comprises at least half of all organic chemistry research worldwide. In particular, the…

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