Pyrrole derivatives represented by the following formula:
1
wherein Ring Z is an optionally substituted pyrrole ring, etc.; W
2
is —CO—, —SO
2
—, an optionally substituted C
1
-C
4
alkylene, etc.; Ar
2
is an optionally substituted aryl, etc.; W
2
and Ar
1
mean the following (1) and (2):
(1) W
1
is an optionally substituted C
1
-C
4
alkylene, etc.; Ar
1
is an optionally substituted bicyclic heteroaryl having 1 to 4 nitrogen atoms as ring-forming atoms:
(2) W
1
is an optionally substituted C
2
-C
5
alkylene, an optionally substituted C
2
-C
5
alkenylene, etc.; and Ar
1
is an aryl or monocyclic heteroaryl, which are substituted by carboxyl, an alkoxycarbonyl, etc. at the ortho- or meta-position thereof with respect to the binding position of W
1
,
or a pharmaceutically acceptable salt thereof
These compounds are useful as medicaments such as a fibrosis inhibitor for organs or tissues.
Medicament being useful as a fibrosis inhibitor for organs or tissues, which comprises a compound of the formula (I):
wherein Ring Z is optionally substituted pyrrole ring, etc.; W2 is -CO-, -SO2-, optionally substituted C1-C4 alkylene, etc.; Ar2 is optionally substituted aryl, etc.; W1 and Ar1 mean the following (1) and (2):
(1) W1 is optionally substituted C1-C4 alkylene, etc.; Ar1 is optionally substituted bicyclic heteroaryl having 1 to 4 nitrogen atoms as ring-forming atoms:
(2) W1 is optionally substituted C2-C5 alkylene, optionally substituted C2-C5 alkenylene, etc.; and
Ar1 is aryl or monocyclic heteroaryl, which is substituted by carboxyl, alkoxycarbonyl, etc. at the ortho- or meta-position thereof with respect to the binding position of W1,
or a pharmaceutically acceptable salt thereof.