UV- Vis Shift reagent study on 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-8-{(3,4,5- trihydroxy-6-(hydroxymethyl)tetrahydro-2H-2-pyranyl)oxy}-4H-4-chromenone

We have studied the characteristic shift in absorption using versatile UV-Visible shift reagents for the compound I namely, 2- (3,4-dihydroxyphenyl)-3,5,7-trihydroxy-8-{(3,4,5-trihydroxy-6-(hydroxymethyl) tetrahydro-2H-2-pyranyl)oxy-4H-4 chromenone which was discovered earlier in our laboratory from the plant extract of Hibiscus calyphyllus flowers