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Article | REF: P1092 V1

Applying NMR to structure determination

Author: Nicole PLATZER

Publication date: September 10, 2002

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4. Biomolecules

4.1 Piperine. Conformational exchanges

Molecule 12 below is extracted from Madagascar pepper.

  • The 2D techniques COSY, HMQC then HMBC and NOESY identify molecule 12 as piperine. The tricky part is interpreting the nitrogen ring signals. The 1 H spectrum contains 4 multiplets (2,2,2,4) and the...

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