The present invention relates to a novel nitrile glycoside of Formula I named NIAZIRIDIN and to analogues and derivatives thereof. The present invention also relates to a process for the isolation of a novel nitrile glycoside of Formula I below named NIAZIRIDIN and its derivatives and analogues by bioactivity-guided fractionation from the pods of Moringa oleifera. The present invention particularly relates to the bioenhancing activity of the novel nitrile glycoside of Formula I below named NIAZIRIDIN and its derivatives and analogues in enhancing bioactivity of commonly used antibiotics such as rifampicin, tetracycline and ampicillin against Gram (+) and (−) bacteria. The biomolecule also enhances the absorption of drugs, vitamins and nutrients through the gastro-intestinal membrane increasing their bio-availability. Therefore niaziridin can be used in combination therapy with drugs and nutrients resulting in reduced drug associated toxicity, reduced cost and duration of chemotherapy.