| abstract |
The present invention relates to a heterocyclic compound represented by the general formula (I) a salt thereof: wherein m, 1, and n respectively represent an integer of 1 or 2; X represents -O- or -CH-; It represents hydrogen, a lower alkyl group, a lower hydroxyalkyl group, a protecting group, or a lower trialkylsilyloxy-lower alkyl group; Ry R, which are the same or different, each independently represents hydrogen or a lower alkyl group; or Ry R join to form a C-Cy cycloalkyl group. It represents an aromatic group or a heterocyclic group, wherein the aromatic or heterocyclic group may have no or more arbitrary substituent (s). |