The chemical profiles of grape seed extract characterized by phloroglucinolysis.

1Mass conversion based on % recovery of procyanidin by phloroglucinolysis based on the gravimetric mass.2Mean degree of polymerization.3Estimated molecular mass based on subunit composition from phloroglucinolysis.4Percent composition of terminal and extension subunits (in moles) with the following subunit abbreviations: (-P), phloroglucinol adduct of extension subunit; C, (+)-catechin; EC, (−)-epicatechin; ECG, (−)-epicatechin-3-O-gallate.