| abstract |
Quinone derivatives represented by the general formula(wherein, R' and R<sup>2</sup>, which are the same or different, refer to a hydrogen atom, methyl or methoxymethyl group, or R<sup>1</sup> and R<sup>2</sup> bind together to form -CH = CH-CH = CH-; R<sup>3</sup> is a hydrogen atom or methyl group; R<sup>4</sup> is a nitrogen-containing heterocyclic group which may be substituted; R<sup>5</sup> is a hydrogen atom, methyl group, hydroxymethyl group which may be substituted, or a carboxyl group which may be esterified or amidated; Z isor (wherein, R' is a hydrogen atom or methyl group); n is an integer from 0 through 12, m is an integer from 0 through 3, and k is an integer from 0 through 7, providing that, when m is 2 or 3, Z and k are able to vary appropriately in the repeating unit shown in [ ] ), and the hydroquinone derivatives thereof, are novel compounds, possess improvement effects of metabolism of poly unsaturated fatty acids, parficularly two or more of inhibition of production of fatty acid peroxides, inhibition of production of metabolites in 5-lipoxygenase pathway, inhibition of thromboxane A<sub>2</sub> synthetase, thromboxane A<sub>2</sub> receptor antagonism and scavenging action of active oxygen species, and of use as drugs, such as antithrombotics, anti-vascular constriction agents, anti- asthma agent, antiallergic agents, therapeutics for psoriasis, agents for improvement in heart, brain and cardiovascular systems, therapeutics for nephritis, active oxygen-eliminating agents, anticancer agents, agents for improvement of control of arachidonate cascade products, etc. |