Patent ID: 7342036

Claim:
An isoxazole derivative represented by the following formula (I′) (wherein R 1a is an optionally substituted C 1 -C 10 alkyl group, optionally substituted C 2 -C 10 alkenyl group or optionally substituted C 2 -C 10 alkynyl group); R 2 and R 3 , which may be the same or different, each independently represents a hydrogen atom, halogen atom, hydroxy group, optionally substituted C 1 -C 20 alkyl group, or optionally substituted C 6 -C 20 aryl group; R 4 , which may be the same or different, each independently represents a hydrogen atom, halogen atom, hydroxy group, cyano group, nitro group, optionally substituted amino group, optionally substituted C 1 -C 20 hydrocarbon group, optionally substituted C 1 -C 10 alkoxy group, optionally substituted C 1 -C 10 acyl group or optionally substituted 5- to 7-membered heterocyclic group; and n represents 0, 1, 2, 3 or 4).