Iridoid Compounds and Antimicrobial Activity of the Roots of Tecoma stans(L) Juss

Abstract

The combined ethyl acetate and methanolic extracts of the roots of Tecoma stans gave two iridoid compounds, 5-deoxystantioside, plantarenaloside when subjected to chromatographic techniques. In addition to iridoid compounds luteolin, lupeol acetate and β-sitosterol were also isolated. The structures of these compounds were determined by spectral means (¹H NMR, IR, UV, MS). Further the extracts and the isolates were subjected to antimicrobial studies, which showed moderate activity.