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First 13 C‐NMR Assignments of Betaxanthins
Author(s) -
Stintzing Florian C.,
Kugler Florian,
Carle Reinhold,
Conrad Jürgen
Publication year - 2006
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200690077
Subject(s) - chemistry , pear , two dimensional nuclear magnetic resonance spectroscopy , nuclear magnetic resonance spectroscopy , carbon 13 nmr , stereochemistry , botany , biology
Due to their inherent liability towards highly acidic conditions previously considered to be a prerequisite for data acquisition, betaxanthin structure dereplication by NMR spectroscopy has been scarcely reported and was, hitherto, exclusively based on 1 H‐NMR data interpretation. Applying only slightly acidic conditions, we herein report the first 13 C‐NMR data of two betaxanthins, i.e. , indicaxanthin ( 1 ), isolated from yellow‐orange cactus pear fruits ( Opuntia ficus‐indica [L.] Mill . cv. ‘Gialla’), and of miraxanthin V ( 2 ) from yellow Swiss chard petioles ( Beta vulgaris L. ssp. cicla [L.] Alef . cv. ‘Bright Lights’), as derived by gHSQC‐ and gHMQC‐NMR experiments and inverse detection.