The ethyl acetate fraction of a methanolic extract of unripe noni (Morinda citrifolia Linn.) fruit exhibits a biphasic effect on the dopaminergic system in mice

未成熟诺丽果（Morinda citrifolia Linn.）的甲醇提取物的乙酸乙酯部分对小鼠的多巴胺系统表现出双相作用