A vitamin B6 derivative, 4′-O-methylpyridoxine (MPN) is responsible for food poisoning by Ginkgo biloba seeds. MPN-5′-glucoside is also contained in Ginkgo biloba seeds. In this study, we examined the toxicity of MPN-5′-glucoside in mice and MPN-5′-glucoside content in Ginkgo biloba ...