Procyanidins are members of the proanthocyanidin (or condensed tannins) class of flavonoids. 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 ¹⁾.