Fenoles

Chebulagic acid, isolated from the fruits of Terminalia, it shows potent COX–LOX dual inhibition activity with IC50 values of 15 ± 0.288, 0.92 ± 0.011 and 2.1 ± 0.057 μM for COX-1, COX-2 and 5-LOX respectively, it also shows anti-proliferative activity against HCT-15, COLO-205, MDA-MB-231, DU-145 and K562 cell lines, it induces apoptosis in COLO-205 cell line.

Vanillic acid is a potent free radical scavenger, thus, it exerts protective effects in isoproterenol induced cardiotoxic rats due to its free radical scavenging, antioxidant and anti-inflammatory properties.

Ellagic acid, a naturally occurring plant phenol, inhibits the activity of the direct-acting mutagen N-methyl-N-nitrosourea (MeNU) in Salmonella typhimurium TA100, is due to specific inhibition of methylation at the O6 position of guanine through an ellagic acid-duplex DNA affinity-binding mechanism.

Echinacoside is a natural polyphenolic compound, has various kinds of pharmacological activities, such as anti-senescence, anti-hypoxia, anti-cancer, anti-osteoporosis, antioxidative, anti-inflammatory, neuroprotective, hepatoprotective, nitric oxide radical-scavenging and vasodilative ones. Echinacoside can improve the hematopoietic function of bone marrow in 5-FU-induced myelosuppression mice, it induces apoptotic cancer cell death by inhibiting the nucleotide pool sanitizing enzyme MTH1. Echinacoside inhibits cytochrome c release and caspase-3 activation caused by ensuing rotenone exposure via activating Trk-extracellular signal-regulated kinase (ERK) pathway in neuronal cells.