proanthocyanidin a 1

Cinnamtannin B-1 (LDN 0022358) is an A-type proanthocyanidin contained in several plant species such as Vaccinium vitis-idaea, Laurus nobilis L., Cinnamomum zeylanicum, and Lindera umbellata. It is a potent antioxidant and protective agent against oxidative stress and apoptosis in human platelets. It is a Cox-2 inhibitor.

Geranin A, an A-type proanthocyanidin, can be isolated from the antiprotozoal extract of Geranium niveum [1].

Procyanidin A5 is a type A dimerized proanthocyanidin [1].

Procyanidin A1 (Proanthocyanidin A1) has antiallergic effects, it inhibits degranulation downstream of protein kinase C activation or Ca2+; influx from an internal store in RBL-2H3 cells.