| abstract |
The present invention relates to a compound of formula (I) or a pharmaceutically acceptable salt or ester thereof.n n n Formula In n n n n n n n In Formula I,n n n R 1 is a hydrogen atom, F, CN, or the like;n n n R 2 is O, S, SO, SO 2 , or the like;n n n R 3 is phenyl which may be substituted;n n n X 2 is CH, N and the like;n n n W is a chemical formula Is the residue of W 1 , W 2 and W 3 is each independently CH, N, or the like. |