Flavocetraria cucullata

Deriv Octaacetyl compound, mp 115-118 °C (EtjO), from the pigment with AC2O-H2SO4 StL Flavocetraria cucullata (Bell.) Karnef. et TheU... 

For cuculloquinone, a bisnaphthoquinmie of Flavocetraria cucullata was found to inactivate DPPH to an 80 % extent, while the BHT that was used as a standard antioxidant was twofold less active (Stepanenko et al. 2002). 

Flavocetraria nivalis Flavocetraria cucullata Usnic acid Dibenzoftiranes APP Inhibition of tyrosine phosphatase Cytotoxic activity Apoptosis Antibiotic activity Antibacterial activity Antitrypanosomal activity Antiviral activity Francolini et al. (2004) De Carvahlo et ah (2005) Mayer et al. (2005) Elo et al. (2007) Fazio et al. (2007) Bazin et al. (2008) Burlando et al. (2009)... 

Impressive antioxidant properties of cmde extracts of lichens have been reported, but ironically the secondary metabolites obtained from lichens have not shown any promising antioxidant property. Due to the presence of large quantities of polyphenolic compounds, lichens are expected to exhibit antioxidant activities [3,102]. CucuUoquinone from Flavocetraria cucullata (Bellardi) Kamefelt A. TheU. exhibited up to 80% inhibition of 2,2-diphenyl-l-picrylhydrazil (DPPH)-free radical where BHT was used as a standard. The activity was found to be twofold higher than that of standard [103]. Bhattarai and coworkers have reported the antioxidant potential of five Uchen species, collected in Antarctica, crmtaining 30-35% phenolic contents. Extracts of aU species were found to be antioxidant in nature. They also evaluated the antioxidant properties of methyl orseUinate (57), atranorine (78),... 

---