| abstract |
A compound of the following formula (1), or its prodrug or pharmaceutically acceptable salt thereof, being useful as a diabetic medicine or preventive, or blood sugar regulator, or therapeutic agent for hyperlipemia, etc. n n n n n n n n n n n n wherein the ring Z is an optionally substituted heteroaryl, W 4 is a single bond, lower alkylene, etc., Ar 2 is an optionally substituted aryl, etc., W 3 is a single bond, lower alkylene, etc., Ar 1 is an optionally substituted arylene, etc., each of W 1 and W 2 is an optionally substituted lower alkylene, etc., and R 1 is carboxyl, an alkoxycarbonyl. |