The present invention relates to indole derivatives represented by formula (I):
 wherein R1 and R2 independently represent hydrogen, lower alkyl, -O-(CH2)n-OR6, or
 R3 represents hydrogen, lower alkyl, or
 and R4 and R5 represent hydrogen, lower alkyl, alicyclic alkyl, substituted or unsubstituted aryl, a substituted or unsubstituted heterocyclic group,
 or -(CH2)r-R13, or pharmaceutically acceptable salts thereof.
                            本发明涉及式 (I) 所代表的
吲哚衍
生物:
 其中 R1 和 R2 独立地代表氢、低级烷基、-O-(
CH2)n-OR6,或
 R3 代表氢、低级烷基,或
 以及 R4 和 R5 代表氢、低级烷基、脂环烷基、取代或未取代的芳基、取代或未取代的杂环基团、
 或-(   )r-R13,或其药学上可接受的盐类。