Patent ID: 7241785

Claim:
A compound represented by the formula: wherein R 1 is an optionally substituted oxazolyl group; X is a bond, an oxygen atom, a sulfur atom, —CO—, —CS—, —CR 3 (OR 4 )— or —NR 5 — (R 3 is a hydrogen atom or an optionally substituted hydrocarbon group, R 4 is a hydrogen atom or a hydroxy-protecting group and R 5 is a hydrogen atom, an optionally substituted hydrocarbon group or an amino-protecting group); Q is a divalent hydrocarbon group having 1 to 20 carbon atoms; Y is a bond, an oxygen atom, a sulfur atom, —SO—, —SO 2 —, —NR 6 —, —CONR 6 — or —NR 6 CO— (R 6 is a hydrogen atom or an optionally substituted hydrocarbon group); ring A is an aromatic ring optionally further having 1 to 3 substituents; Z is —(CH 2 ) n —Z 1 — or —Z 1 —(CH 2 ) n — (n is an integer of 0 to 8, Z 1 is a bond, an oxygen atom, a sulfur atom, —SO—, —SO 2 —, —NR 7 —, —CONR 7 — or —NR CO— (R 7 is a hydrogen atom or an optionally substituted hydrocarbon group)); ring B is a pyrazole ring optionally further having 1 to 3 substituents; W is a divalent saturated hydrocarbon group having 1 to 20 carbon atoms; and R 2 is —OR 8 (R 8 is a hydrogen atom or an optionally substituted hydrocarbon group) provided that ring B does not have, on the ring-constituting N atom, a substituent represented by the formula: wherein R 1a is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group; Xa is a bond, an oxygen atom, a sulfur atom, —CO—, —CS—, —CR 2a (OR 3a )— or —NR 4a — (R 2a and R 4a are each a hydrogen atom or an optionally substituted hydrocarbon group and R 3a is a hydrogen atom or a hydroxy-protecting group); ma is an integer of 0 to 3; Ya is an oxygen atom, a sulfur atom, —SO—, —SO 2 —, —NR 5a —, —CONR 5a — or —NR 5a CO— (R 5a is a hydrogen atom or an optionally substituted hydrocarbon group); ring Aa is an aromatic ring optionally further having 1 to 3 substituents; and na is an integer of 1 to 8, or a salt thereof, or a prodrug thereof.