The present invention aims to provide a neuron degeneration inhibitor.

The present invention relates to a neuron degeneration inhibitor comprising a compound represented by the formula (I)

##STR00001##

wherein each symbol is as defined in the description, or a salt thereof.

The present invention relates generally to the field of antimicrobial compounds and to methods of making and using them. These compounds are useful for treating, preventing, and reducing the risk of microbial infections in humans and animals.

The present invention relates generally to the field of antimicrobial compounds and to methods of making and using them. These compounds are useful for treating, preventing, and reducing the risk of microbial infections in humans and animals.

The present invention relates to compounds and methods useful as inhibitors of phosphodiesterase 4 (PDE4) for the treatment or prevention of disease.

The present invention relates to compounds and methods useful as inhibitors of phosphodiesterase 4 (PDE4) for the treatment or prevention of disease.

The present invention relates to compounds and methods useful as inhibitors of phosphodiesterase 4 (PDE4) for the treatment or prevention of inflammatory diseases and other diseases involving elevated levels of cytokines and proinflammatory mediators.

The present invention relates to compounds and methods useful as inhibitors of phosphodiesterase 4 (PDE4) for the treatment or prevention of inflammatory diseases and other diseases involving elevated levels of cytokines and proinflammatory mediators.

The present invention relates to compounds and methods useful as inhibitors of phosphodiesterase 4 (PDE4) for the treatment or prevention of inflammatory diseases and other diseases involving elevated levels of cytokines and proinflammatory mediators.

The present invention relates to compounds and methods useful as inhibitors of phosphodiesterase 4 (PDE4) for the treatment or prevention of inflammatory diseases and other diseases involving elevated levels of cytokines and proinflammatory mediators.

The present invention relates to compounds and methods useful as inhibitors of phosphodiesterase 4 (PDE4) for the treatment or prevention of inflammatory diseases and other diseases involving elevated levels of cytokines and proinflammatory mediators.