sentences:  Chromatographic fractionation studies on "D. searlsiae" root extracts have identified at least six root compounds that infer antimicrobial activity.Among these, two known flavanones and four newly discovered flavanones displayed antimicrobial activity against "Streptococcus," "Bacillus," and "Staphylococcus" bacteria.The root also contains two rotenoids and one flavanone that displayed strong insecticidal activity.