Quercitrin: An antileishmanial flavonoid glycoside from Kalanchoe pinnata

Quercitrin (quercetin 3-O-alpha-L-rhamnopyranoside), one of the constituents of the biologically active aqueous extract obtained from Kalanchoe pinnata, is demonstrated to be a potent antileishmanial compound (IC50 approximate to 1 mu g/mL) with a low toxicity profile. This is the first time that antileishmanial activity is demonstrated for a flavonoid glycoside.