Table 3: Selected 1H NMR data for 2,4-cis-7-hydroxyflavan-4-ol (4), 2,4-trans-5,7-dihydroxyflavan-4-ol (5), and 2,4-cis-flavan-4-ol.

δ H-2δ H-4δ H-3axδ H-3eq 𝐽 3 a x - 3 e q 𝐽 2 - 3 a x 𝐽 2 - 3 e q 𝐽 4 - 3 a x 𝐽 4 - 3 e q

2,4-cis-Flavan-4-ol5.175.082.132.5113.0611.621.8310.596.27
2,4-cis-7-Hydroxyflavan-4-ol (4)5.155.032.092.4913.2011.301.809.906.20
2,4-trans-5,7-Dihydroxyflavan-4-ol (5)5.225.523.052.8916.908.4016.7013.302.90