Isolation of antibacterial compounds from Quercus dilatata L. through bioassay guided fractionation

Table 6 Phytochemical analysis of partitioned fractions

Class of compounds		n Hexane	Ethyl acetate	Chloroform	Acetone	Ethanol	50% methanol
Alkaloids	Mayer’s reagent	-	-	-	++	+++	+
Alkaloids	Dragendorff’s reagent	-	-	-	++	+++	+
Saponins		+	-	+	+	++	++
Anthraquinones		+	-	-	-	-	-
Coumarins		-	-	-	-	-	-
Terpenoids		Blue ring in green colour	Blue ring in green colour	-	-	-	-
Flavonoids, Flavones,		Yellow	Yellow	-	-	-	-
Hydrolysable tannins		-	++	-	++	+++	++
Phlobatannins		-	-	-	-	-	-
Cardiac Glycosides		Green blue colour	Green blue colour	-	-	-	-

+++ = Strongly positive, ++ = Moderately positive, + = Weakly positive, - = Negative, Yellow = Flavonoids, Flavones positive, Blue ring in green colour = Terpenoids positive, Red ppt. = Phlobatannins positive, Green blue colour = Cardiac Glycosides positive.

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