Disclosed herein are a novel compound isolated from Ginkgo biloba and a method for isolating the novel compound from Ginkgo biloba. The method comprises: (1) extracting Ginkgo biloba with alcohol to obtain a crude extract; (2) subjecting the Ginkgo biloba crude extract to solvent fractionation using an organic solvent; (3) fractionating the solvent fractions by Sephadex column chromatography; and (4) fractionating the Sephadex fractions by silica gel column chromatography.