| 摘要 |
A compound represented by the formula (I): wherein ring A represents an aromatic ring; X represents a bond, oxygen, NR<SUP>4 </SUP>(R<SUP>4 </SUP>represents hydrogen, a hydrocarbon group, or a heterocyclic group), or alkylene; R<SUP>1 </SUP>represents a hydrocarbon group, or a heterocyclic group; R<SUP>2 </SUP>represents -COYR<SUP>5 </SUP>(Y represents a bond, alkylene, oxygen, sulfur, or NR<SUP>6 </SUP>(R<SUP>6 </SUP>represents hydrogen, a hydrocarbon group, or a heterocyclic group), and R<SUP>5 </SUP>represents a hydrocarbon group, or a heterocyclic group), a hydrocarbon group, or a heterocyclic group; and R<SUP>3 </SUP>represents a hydrocarbon group, a heterocyclic group, optionally substituted hydroxy, optionally substituted amino, or -S(O)<SUB>n</SUB>R<SUP>7 </SUP>(R<SUP>7 </SUP>represents a hydrocarbon group, or a heterocyclic group, and n is 0 to 2), a salt of the compound, or a prodrug or either is useful as an agent for modulating the function of an RFRP receptor.
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