Shiseido Company, Limited

Yoshihiro Yokokawa

Koji Kobayashi

Yuichiro Mori

Mineyuki Yokoyama

Toshii Iida

Shoko Yamaguchi

Minoru Fukuda

Osamu Tanaka

Masako Naganuma

Hisayuki Komasaki

Rumiko Kaku

Kazuhisa Maeda

Shosuke Yamamura

Yuki Yamase

&#x3b1;-Ketol unsaturated fatty acid derivatives represented by the following formula (1), &#x3b1;-ketol unsaturated fatty acid amide derivatives represented by the following formula (6), and plant growth regulators containing, as the active ingredient, at least one of these derivatives: wherein Rrepresents linear Calkyl; R represents hydrogen, etc.; Rrepresents hydrogen, etc.; Rrepresents hydrogen, etc.; Rrepresents hydrogen, etc.; n is an integer from 3 to 15; and the carbon atoms at the A- and B-positions may be in either (R)- or (S)-configuration; and wherein Rrepresents Calkyl, etc; Rrepresents hydrogen, etc.; Rrepresents &#x3b1;-ketolalkylene; and Rrepresents specific divalent linear hydrocarbyl.

Ketol fatty acid derivatives and plant growth regulators

&#x3b1;-Ketol unsaturated fatty acid derivatives represented by the following formula (1), &#x3b1;-ketol unsaturated fatty acid amide derivatives represented by the following formula (6), and plant growth regulators containing, as the active ingredient, at least one of these derivatives:wherein Rrepresents linear Calkyl; Rrepresents hydrogen, etc.; Rrepresents hydrogen, etc.; Rrepresents hydrogen, etc.; Rrepresents hydrogen, etc.; n is an integer from 3 to 15; and the carbon atoms at the A- and B-positions may be in either (R)- or (S)-configuration; andwherein Rrepresents Calkyl, etc; Rrepresents hydrogen, etc.; Rrepresents &#x3b1;-ketolalkylene; and Rrepresents specific divalent linear hydrocarbyl.

Ketol fatty acid derivative and plant growth regulating agents

Synthetic method of &agr;-ketol unsaturated fatty acids

External escinol preparation for skin

An external preparing for skin comprising one or more than two types of 2-hydroxy benzoic acid derivative and/or salt thereof represented by the following formula: ##STR1## wherein R is an alkoxy group or alkyl group in the formula. The external preparation for the skin according to the present invention has a suppression effect on melanine generation by inhibition of tyrosinase activity. Accordingly, an excellent bleaching effect based upon the suppression of chromatosis and a high degree of safety can be obtained.

External preparation for skin

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Kanagawa, Japan

Yoshihiro Yokokawa