N-acetyl-1-aspartylglutamic acid [ N-acetyl-1-Asp-Glu,N-acetyl-1-aspartylglutamic acid, (L)-isomer ion,N-acetyl-1-aspartylglutamic acid, magnesium salt,N-acetyl-L-alpha-aspartylglutamic acid,N-acetyl-aspartyl-glutamate,N-acetyl-aspartyl-glutamic acid,N-acetylaspartylglutamate,NAAGA,NAAGA magnesium salt,NAAGA sodium salt,Naaxia,ZY 15106,ZY-15106,ZY15106,Zy 15109,Zy-15109,Zy15109 ] mediator in the sensitivity of animals to hyperbaric oxygenation; Naaxia is the tradename; apparently can have both a neuroprotective and a neurotoxic effect