ethosuximide(+-)-2-ethyl-2-methylsuccinimide2-ethyl-2-methylsuccinimide2-methyl-2-ethylsuccinimide3-ethyl-3-methyl-2,5-pyrrolidinedione3-ethyl-3-methylsuccinimide3-methyl-3-ethylpyrrolidine-2,5-dione3-methyl-3-ethylsuccinimideAethosuximideEthosuximidealpha-ethyl-alpha-methylsuccinimidealpha-methyl-alpha-ethylsuccinimidegamma-ethyl-gamma-methyl-succinimidegamma-methyl-gamma-ethyl-succinimide