Oxcarbazepine-d4 (GP 47680-D4) is the deuterium labeled Oxcarbazepine. Oxcarbazepine is a sodium channel blocker[1]. Oxcarbazepine significantly inhibits glioblastoma cell growth and induces apoptosis or G2/M arrest in glioblastoma cell lines[2]. Anti-cancer and anticonvulsant effects[2][3].