nitroquinoline in TA 98 and by methyl methanesulfonate (MMS) in TA 100. Aniracetam 2.5 mg/plate decreased the mutagen-induced revert ants in TA 98, which might be of the toxicity of aniracetam.

• 向拉西坦和吡乙酰胺在诱变协同实验中均不增加对-硝基喹啉在TA98上和甲基磺酸甲酯在TA100上诱发的回变数。