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B-type linkage

Figure 6.30. Possible structures proposed for M+ at m/z, 1273 (a) (E)C-MvG-Mv+G trimer in flavene-flavylium form (B-type linkage) (b) (E)C-MvG-Mv+G trimer in flavan-flavylium form (A-type linkage). (Reprinted iromJournal of Mass Spectrometry, 42, Alcalde-Eon et al., Identification of dimeric anthocyanins and new oligomeric pigments in red wine by means of HPLC-DAD-ESI/MS p. 744, Copyright 2007, with permission from John Wiley Sons, Ltd.)... Figure 6.30. Possible structures proposed for M+ at m/z, 1273 (a) (E)C-MvG-Mv+G trimer in flavene-flavylium form (B-type linkage) (b) (E)C-MvG-Mv+G trimer in flavan-flavylium form (A-type linkage). (Reprinted iromJournal of Mass Spectrometry, 42, Alcalde-Eon et al., Identification of dimeric anthocyanins and new oligomeric pigments in red wine by means of HPLC-DAD-ESI/MS p. 744, Copyright 2007, with permission from John Wiley Sons, Ltd.)...
Trimeric PAs can also be divided in two groups C-type PAs that present two B-type linkages and D-type PAs that present one B-type and one A-type linkage. Higher polymerized structures may have a very high number of isomeric forms due to the variety of the bond linkage types and also to the stereochemistry of the monomeric units. Oligomeric PAs have up to six monomeric units, and polymeric ones have more than six condensed units (Fig. 57.8) [71]. [Pg.1759]

See other pages where B-type linkage is mentioned: [Pg.53]    [Pg.488]   
See also in sourсe #XX -- [ Pg.53 ]



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B Type

Linkage types

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