| dc.description.abstract | The phenolic conipound had beeri isolated from the flo1;vers of the great crepe myrtle
( L. speciosa (L.) Pers ). The flowe,·s of the giant crepe were extracted by ,nace ration, with
niethanol solvent, and the concentrated methanol extract was dissolved with ethyl acetate
repeatedly until the solution was negative. Ethyl acetate concentrated extract was dissolved
in methanol and partitioned witli n-liexane. The methanol extract was analyzed by
th.in-layer chromatogra phy and separated by column chromatography using chlorofonn-ethyl
acetate eliten,t 30:70, 20:80, 10:90 (vlv). Tlie compourid was obtain,ed as a greenish-yellow
solid of 8,6 nig with ari Rf value of
0.62 with chloroform-ethyl acetate as eluent 30:70 (v/v ). From on the UV-Vis spectrum
showing the presence maximwn absorption of a 111a velength (Amax) of 275 nm in bctnd I and 218 nm
in band 11, the FT-JR spectrum shows the presence of OHJ
C -H, C=O ester groitps, C=C aroniatic, C-Hsp3, C-0. Proton Nuclear Magnetic Resonance
Spectrum (l H-NMR ) shows the presence of protons H-2 and H-6, protons fro,n CH3 bonded to the
benzene ring, and protons of niethox y. Based on t/1,e interpretation of the data, the
isolated compound is a phenolic compound belonging
to the phenolic acid groitp, wliich is suspected to be methyl gallate | en_US |
