13C-NMR. Study on Isoalloxazine and Allo
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Hans J. Grande; Robert Gast; Cees G. Van Schagen; Willem J. H. Van Berkel; Franz
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Article
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1977
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John Wiley and Sons
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German
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## Abstract A series of isoalloxazine and alloxazine derivatives have been investigated by ^13^CβNMR. The synthesis of selectively ^13^Cβenriched derivatives made it possible to assign unambiguously the signals due to the quaternary carbon atoms at position 4, 4a and 10a of the isoalloxazine ring s