Proanthocyanidin gallates

Nishioka. Tannins and related compounds. XV. A new class of dimeric flavan-3 ol gallates, theasinensins A CSl51 and B, and proanthocyanidin gallates from green tea leaf. I. Chem Pharm... 

Lee, M-W. et al.. Tannins and related compounds. III. Flavan-3-ol gallates and proanthocyanidins from Pithecellohium lobatum. Phytochemistry, 31, 2117, 1992. 

Dopamine receptor Epigallocatechin gallate Croton celtidifolius proanthocyanidins PCI2 cells Swiss mice Inhibition D2- agonist Li et al., 2006 DalBo et ah, 2006... 

There are discordant reports regarding the distribution of the molecular weights (MW) of proanthocyanidins in the seeds. Nevertheless, it has been reported that their mean degree of polymerization (mDP) is lower than 10 and that they are mainly constituted of (+)-catechin and (—)-epicatechin with a minor extent of (—)-epicatechin gallate. (+)-Catechin, (—)-epicatechin and (—)-epicatechin gallate are the terminal monomers (Kennedy and Jones, 2001 Downey et al., 2003 Pastor del Rio and Kennedy, 2006) (—)-epigallocatechin is absent in the seed proanthocyanidins. 

Proportional composition of proanthocyanidins (in moles), and with the following subunit abbreviations EGC-P (-)-epigallocatechin extension subunit C-P (+)-catechin extension subunit EC-P (-)-epicatechin extension subunit C (+)-catechin terminal subunit ECG-P (-)-epicatechin-3-0-gallate extension subunit EC (-)-epicatechin terminal subunit ECG (-)-epicatechin-3-0-gallate terminal subunit Conversion yield (by mass) in the conversion of proanthocyanidin fraction to known subunits Mean degree of polymerization... 

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