INDOLE DERIVATIVES

摘要

The present invention relates to indole derivatives represented by formula (I): <CHEM> wherein R<1> and R<2> independently represent hydrogen, lower alkyl, -O-(CH2)n-OR<6>, or <CHEM> R<3> represents hydrogen, lower alkyl, or <CHEM> and R<4> and R<5> represent hydrogen, lower alkyl, alicyclic alkyl, substituted or unsubstituted aryl, a substituted or unsubstituted heterocyclic group, <CHEM> or -(CH2)r-R<13>, or pharmaceutically acceptable salts thereof.