Provided are a 
fluorine-containing 
amino acid prodrug represented by general formula (I) that makes a 
fluorine-containing 
amino acid which is a group 2 
metabotropic glutamate receptor agonist into a 
prodrug, or a pharmaceutically acceptable salt thereof. More specifically, provided is a 
prodrug that increases the 
in vivo exposure and enhances the oral absorbability and other mucosal absorbability of a parent compound that acts on group 2 metabotropic glutamate receptors as an agent for the treatment or prevention of diseases in which group 2 metabotropic glutamate receptors are said to be involved, such as: 
schizophrenia, 
anxiety disorder and its related diseases, depression, bipolar disorder, 
epilepsy, developmental disorders, sleep disorders, and other neuropsychiatric diseases; and 
drug dependence, cognitive disorders, Alzheimer's 
disease, Huntington's 
chorea, Parkinson's 
disease, 
movement disorders associated with muscular rigidity, cerebral 
ischemia, cerebral insufficiency, 
spinal cord disorders, cephalopathy, and other neurological diseases.