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-2	δ H-4	δ H-3ax	δ H-3eq	J 3ax-3eq	J 2-3ax	J 2-3eq	J 4-3ax	J 4-3eq
2,4-cis-Flavan-4-ol	5.17	5.08	2.13	2.51	13.06	11.62	1.83	10.59	6.27
2,4-cis-7-Hydroxyflavan-4-ol (4)	5.15	5.03	2.09	2.49	13.20	11.30	1.80	9.90	6.20
2,4-trans-5,7-Dihydroxyflavan-4-ol (5)	5.22	5.52	3.05	2.89	16.90	8.40	16.70	13.30	2.90