Toxicity of 4′-O-methylpyridoxine-5′-glucoside in Ginkgo biloba seeds

► MPN-5′-glucoside content is much higher than that of MPN in heated Ginkgo biloba seeds. ► MPN-5′-glucoside has a lethal effect in mice, as well as MPN. ► Onset time of convulsions after administration of MPN-5′-glucoside is longer than that after administration of MPN. ► MPN-5′-glucoside might cause food poisoning by Ginkgo biloba seeds.