Ent-epicatechin

Ga-e/jt-epicatechin-(4ci — 8)-ent-epicatechin >jt-epicatechin-(4a 8)-e t-epicatechin-3-0-Ga 3-0-Ga-e/jt-epicatechin-(4ci — 8)-e t-epicatechin-3-0-Ga >jt-epicatechin-(4a 6)-e t-epicatechin Byrsonima crassifoUa 96 ... 

Raw cocoa seeds contain approximately 6.9—18 % proanthocyanidins of defatted dry weight [61, 62]. Porter et al. [63] described (2R,3S)-(+)-catechin, (2R, 3R)-( )-epicatechin, and the dimers epicatechin-(4(3 8)-catechin (procyanidin Bl, see above) procyanidin B, epicatechin-(4p 6)-epicatechin, and epicatechin-(4p 8)-epicatechin (procyanidin Cl) as the dominating compounds in cacao seeds [63]. Two glycosides 3-0-p-D galactopyranosyl-ent-epicatechin-(2a 7,4 a 8) epicatechin and 3-0-L-arabinopyranosyl ent-epicatechin-(2a 7, 4a 8)-epicatechin were found in addition to epicatechin-(2(i 5,4(3 6)-epicatechin [63,64]. 

The profisetinidins in the Anacardiaceae are of unusual structure as they consist of flavanoid units with a IS rather than the normal 2R configuration (see Sect. 7.6). This situation is rare in the proanthocyanidins and only a few other instances are known the widespread occurrence of e z epicatechin and ent-epicatechin-4 procyanidins in monocotyledonous plants (29), and the presence of ezz epicatechin in Polygonum multiflorum (93) and Uncaria gambir (95). Ent-catechin has been isolated from Polygonum multiflorum (93) and Rhaphiolepsis umbellata (91) - as the 7-O-glucoside and 3-O-gallate, respectively. 

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