The present invention relates to a novel compound isolated from Quamoclit sp., and more particularly to a novel compound isolated from Quamoclit sp. and a composition for preventing or treating diabetes and its complications comprising the compound as an active ingredient. The novel compound isolated from Quamoclit sp. according to the present invention has excellent effects on lowering blood sugar, promoting insulin secretion, inhibiting VEGF expression, and so on. Thus, the present invention not only functions to prevent or treat diabetes and its complications, but also functions to promote treatment effects when treated together with conventional diabetes medicines.
