55123467n8678XProvided is a compound useful as an endothelial lipase inhibitor. The compound is a compound represented by formula (I) a pharmaceutically acceptable salt thereof or a solvate of either. In formula (I) ring A is an aromatic carbocycle or an aromatic heterocycle Z is NR O or S R is a hydrogen atom an (un)substituted alkyl an (un)substituted aryl etc. R is a hydrogen atom a halogen atom hydroxy cyano nitro carboxy an (un)substituted alkyl etc. R and R each independently is a hydrogen atom a halogen atom hydroxy etc. R is a group represented by the formula (CRR) R (wherein R and R each independently is a hydrogen atom a halogen atom hydroxy etc. n is an integer of 0 3 and R is carboxy cyano an (un)substituted alkyl etc.) R is a halogen atom hydroxy cyano nitro carboxy an (un)substituted alkyl etc. and m is an integer of 0 3.
