Patent ID: 6458960
Filing Date: 2002-10-01
Classification: C07C,C07D

Abstract:
A compound of formula (1) (wherein R1 and R2 may be the same or different and each independently represents a hydrogen atom, a halogen atom, a lower alkoxy group, a nitro group, a hydroxy group; each R3, R4, R5 and R6 represents a hydrogen atom;A represents a 5-membered heterocyclic hydrocarbon group (except triazoyl group) having at least two unsaturated bonds and containing at least two heteroatoms, and being optionally substituted by a lower alkyl group or phenyl group, whose ring members include at least 1 nitrogen atom and may include and atom(s) selected from the group consisting of nitrogen atom, oxygen atom, and sulfur atom, or pharmaceutically acceptable salts thereof.