摘要:
A compound, or its salt or a solvate thereof, having the formula (Va):
for producing a 7-membered heterocyclic compound, or its salt or a solvate thereof having formula (I):
the compound of formula (I) having a chymase inhibitory action and useful for the prevention or treatment of various diseases in which chymase is involved and a method of producing a compound of formula (I) from a compound of formula (Va) are provided.