| 摘要 |
A compound of the formula, in which X represents O, S, SO or SO2 and R represents a hydrogen atom or a phenyl (1-4C)alkyl or diphenyl (1-4C)alkyl group which is unsubstituted or substituted on phenyl by one or two substituents selected independently from halogen, (1-4C)alkyl, (1-4C)alkoxy and phenyl or a non-toxic metabolically labile ester or amide thereof; or a pharmaceutically acceptable salt thereof. The said compound is useful as modulators of metabotropic glutamate receptor function. |
