| abstract |
The present invention provides a TGF-.beta. superfamily production/secretion promoter comprising a compound represented by the formula wherein R1 is a halogen atom, an optionally substituted heterocyclic group, an optionally substituted hydroxy group, an optionally substituted thiol group or an optionally substituted amino group; A is an optionally substituted acyl group, an optionally substituted heterocyclic group, an optionally substituted hydroxy group or an optionally esterified or amidated carboxyl group; B is an optionally substituted aromatic group; X is an oxygen atom, a sulfur atom or an optionally substituted nitrogen atom; and Y is a divalent hydrocarbon group or heterocyclic group, or a salt thereof or a prodrug thereof, which is useful as an agent for the prophylaxis or treatment of dysautonomia, bladder dysfunction, hearing impairment, bone disease and the like. |