[[Procyanidin]]s are members of the [[proanthocyanidin]] (or condensed tannins) class of [[flavonoid]]s. They are oligomeric compounds, formed from catechin and epicatechin molecules. They yield [[cyanidin]] when depolymerized under oxidative conditions.

Oligomeric Proantho Cyanidins provides neuroprotection against early brain injury following subarachnoid hemorrhage possibly via anti-oxidative, anti-inflammatory and anti-apoptotic effects
((Zhang GX, Ma J, Lu HC, Ye ZN, Liu J, Wang CB. Oligomeric Proantho Cyanidins
provides neuroprotection against early brain injury following subarachnoid
hemorrhage possibly via anti-oxidative, anti-inflammatory and anti-apoptotic
effects. J Clin Neurosci. 2017 Aug 8. pii: S0967-5868(16)31415-1. doi:
10.1016/j.jocn.2017.07.011. [Epub ahead of print] PubMed PMID: 28800927.
)).