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Monomer (MW: 290), n = 0; dimer (MW: 578), n = 1; trimer (MW: 866), n = 2; tetramer (MW: 1154), n = 3; pentamer (MW: 1442), n = 4. R=R3 β-OH monomer: catechin (MW: 290); R=R3a-OH monomer: epicatechin (MW: 290); R=R3 β-O-gallate monomer: catechin 3-O- gallate (MW: 442); R=R3a-O- gallate monomer: epicatechin 3-O- gallate (MW: 442).
