Abstract: A blood fluidity-improving agent, a blood circulation promoter or a cerebrovascular disease-improving agent, containing as an active ingredient thereof one or more ingredients selected from the group consisting of chlorogenic acids, caffeic acids, ferulic acids and pharmaceutically acceptable salts of these acids. The present blood fluidity-improving agent, blood circulation promoter or cerebrovascular disease-improving agent is highly safe and can be orally taken over longer periods of time.

Abstract: A blood fluidity-improving agent, a blood circulation promoter or a cerebrovascular disease-improving agent, containing as an active ingredient thereof one or more ingredients selected from the group consisting of chlorogenic acids, caffeic acids, ferulic acids and pharmaceutically acceptable salts of these acids. The present blood fluidity-improving agent, blood circulation promoter or cerebrovascular disease-improving agent is highly safe and can be orally taken over longer periods of time.

Abstract: The invention relates to UV absorbers and cosmetic compositions containing a naphthalenemethylenemalonic diester represented by the following formula (1): ##STR1## wherein NAP represents a naphthalene group which may optionally have a substituent, and R.sup.1 and R.sup.2 each independently represent a hydrocarbon group, an alkoxyalkyl group, or an alkoxyalkylenoxyalkyl group. The UV absorbers and the cosmetic compositions of the invention exhibit excellent ultraviolet ray absorbing action, and are stable to light.

Abstract: A novel aroyl ketone derivative represented by formula (I) is disclosed.Ar(COCH.sub.2 COR.sup.1).sub.n (I)wherein R.sup.1 represents a saturated or unsaturated hydrocarbon group having 1-24 carbon atoms, or a linear or branched alkoxyalkyl or alkenyloxyalkyl group having 1-24 carbon atoms, dialkylamino group having 1-24 carbon atoms, Ar represents a benzene or naphthalene ring which may be substituted with one or more hydroxyl groups, alkoxy groups having 1-24 carbon atoms, alkenyloxy groups having 1-24 carbon atoms, polyoxyleneoxy groups, mono- or dialkyl amino groups having 1-24 carbon atoms, or .alpha.-methylenedioxy groups, and n denotes an integer of 1-4. An UV-ray absorber and cosmetic composition comprising the aroyl ketone derivative of formula (I) are also disclosed.

Abstract: A novel aroyl ketone derivative represented by formula (I) is disclosed:Ar(COCH.sub.2 COR.sup.1).sub.n (I)wherein R.sup.1 represents a saturated or unsaturated hydrocarbon group having 1-24 carbon atoms, or a linear or branched alkoxyalkyl or alkenyloxyalkyl group having 1-24 carbon atoms, dialkylamino group having 1-24 carbon atoms, Ar represents a benzene or naphthalene ring which may be substituted with one or more hydroxyl groups, alkoxy groups having 1-24 carbon atoms, alkenyloxy groups having 1-24 carbon atoms, polyoxyleneoxy groups, or .alpha.-methylenedioxy groups, and n denotes an integer of 1-4. An UV-ray absorber and cosmetic composition comprising the aroyl ketone derivative of formula (I) are also disclosed. Aroyl ketone derivative (I) of the present invention can provide an excellent UV-ray absorbing effect and has outstanding stability against light, and the UV-ray absorber or cosmetic composition containing the aroyl ketone derivative (I) can exhibit an excellent sunscreening effect.