Retene (NSC-26317) is widely present in recent and ancient sediments, and compounds can be extracted from fir forest soils, humic coals, terrestrial petroleum hydrocarbon source rocks, and deep-sea sediments.Retene is produced by dehydrogenation of pine acids during petrogenesis.

Gastric Inhibitory Peptide, porcine 是一种葡萄糖依赖性的胰岛素性多肽，是一种 42 个氨基酸的肠道激素，对脂肪和葡萄糖代谢有影响。

(-)-Epiafzelechin exhibits significant anti-inflammatory activity on carrageenin-induced mouse paw edema, it exhibits a dose-dependent inhibition on the COX activity with an IC50 value of 15 microM, it exhibits about 3-fold weaker inhibitory potency on the enzyme activity than indomethacin as a positive control.