Antiviral Activity of Fridericia formosa (Bureau) L. G. Lohmann (Bignoniaceae) Extracts and Constituents

Figure 1

RP-HPLC-DAD fingerprints for the crude ethanol extracts from (a) ethanol extract from Fridericia formosa leaves (EEFFL) with mangiferin (RT = 7.8 min) and 2′-O-trans-caffeoylmangiferin (RT = 11.8 min) UV spectrum registered online detection 350 nm, (b) ethanol extract from Fridericia formosa stems (EEFFS) with UV spectra registered online for peak corresponding to chrysin (RT = 26.8 min), (c) ethanol extract from Fridericia formosa fruits (EEFFF) with UV spectra registered online for peak corresponding to 2′-O-trans-coumaroylmangiferin (RT = 13.6 min), and (d) for a mixture of the isolated compounds with UV spectra registered online for peak corresponding to 2′-O-trans-cinnamoylmangiferin (RT = 17.6 min). Detection: 350 nm. Chromatographic conditions: see Experimental.

(a)

(b)

(c)

(d)