Norlichexanthone produced by cultured endolichenic fungus induced from Pertusaria laeviganda and its antioxidant activity

Figures & data

Figure 1. LC-ESI-MS analysis of synthesized norlichexanthone, compound 1 isolated from PtsLa, and methanol extracts of PtsLa.

LC-ESI-MS chromatograms of synthesized norlichexanthone (a), compound 1 isolated from PtsLa (b), and methanol extracts of PtsLa (c), which were detected at m/z 257 in negative ionization mode. Mass spectrum of norlichexanthone (d). Chemical structure of norlichexanthone (e).

Table 1. ORAC values for norlichexanthone and known antioxidant compounds.

	ORAC value (mol TE/g)
Ascorbic acid	0.0290 ± 0.0004
Catechin	0.0442 ± 0.0008
Gallic acid	0.0358 ± 0.0014
Norlichexanthone	0.0202 ± 0.0020
Quercetin dihydrate	0.0545 ± 0.0017

ORAC values were calculated using the differences of areas under the FL decay reaction between a blank and a sample and expressed as moles of Trolox equivalents (TE) per gram of pure compounds (mean ± SD).