Meiji Seika Kaisha, Ltd.

Kaori Tadauchi

Toshiaki Kudo

Kenji Asai

Masaki Tsushima

Naoko Miike

Masako Imai

A medicament useful for preventive and/or therapeutic treatment of nerve system diseases which comprises, as an active ingredient, a compound represented by the following general formula (I) or a pharmacologically acceptable salt thereof:wherein, X represents a group represented by the following general formula (II), (III), (IV), (V), or (VI),'A' represents a saturated or unsaturated 3- to 6-membered carbocyclic group and the like, 'B' represents CHand the like, &#x201c;n&#x201d; represents 0 to 2, Rrepresents a hydrogen atom, a halogen atom and the like, R, R, and Rto Rrepresent a hydrogen atom, a lower alkyl group which may be substituted and the like, Rrepresents a hydrogen atom, a lower alkyl group which may be substituted and the like, Rrepresents a hydrogen atom, a halogen atom and the like, Rrepresents a saturated or unsaturated monocyclic or bicyclic carbocyclic group and the like, and Rand R, Rand R, Rand R, or Rand Rmay bind to each other to form a cyclic structure.

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Kanagawa, Japan

Kaori Tadauchi