Patent ID: 7179823

Claim:
A compound of the formula: wherein R 1 represents a hydrocarbon group which is optionally substituted or a heterocyclic group which is optionally substituted; X represents a bond, an oxygen atom, a sulfur atom, or a group of the formula: —CO—, —CS—, —CR 4 (OR 5 )— or —NR 6 — wherein each of R 4 and R 6 represents a hydrogen atom or a hydrocarbon group which is optionally substituted, R 5 represents a hydrogen atom or a protective group for a hydroxyl group; m represents an integer of 0 to 3; Y represents an oxygen atom, a sulfur atom, or a group of the formula: —SO—, —SO 2 —, —NR 7 —, —CONR 7 — or —NR 7 CO— wherein R 7 represents a hydrogen atom or a hydrocarbon group which is optionally substituted; ring A represents benzene, naphthalene or pyridine, each of which optionally has 1 to 3 substituents; n represents an integer of 1 to 8; ring B represents pyrrole or pyrazole, each of which is optionally substituted by an alkyl group; X 1 represents a bond, an oxygen atom, a sulfur atom, or a group of the formula: —SO—, —SO 2 —, —O—SO 2 — or —NR 16 — wherein R 16 represents a hydrogen atom or a hydrocarbon group which is optionally substituted; R 2 represents a hydrogen atom, a hydrocarbon group which is optionally substituted or a heterocyclic group which is optionally substituted; W represents a bond or a divalent hydrocarbon group having 1 to 20 carbon atoms; R 3 represents a group of the formula: —OR 8 (R 8 represents a hydrogen atom or a hydrocarbon group which is optionally substituted) or —NR 9 R 10 (each of R 9 and R 10 , whether identical or not, represents a hydrogen atom, a hydrocarbon group which is optionally substituted, a heterocyclic group which is optionally substituted, or an acyl group which is optionally substituted; or R 9 and R 10 may bind together to form a 5- to 7-membered cyclic amino group); provided that R 1 is a heterocyclic group which is optionally substituted or R 2 is an aromatic hydrocarbon group which is optionally substituted or a heterocyclic group which is optionally substituted, when ring A is benzene which is optionally substituted, and Y is an oxygen atom, a sulfur atom, —NH— or —CONH—; or a salt thereof.