Nippon Paint Compnay, Ltd.

Yasutaka Miura

Yoshikazu Yamamoto

Yasuhiro Kinoshita

Masako Higuchi

Takashi Yoshii

Koichi Koshimizu

Kunio Takahashi

Keisuke Tashiro

Hajime Ohigashi

Kaoru Takatori

Yasuhiro Knoshita

Kiyotaka Koyama

Disclosed is a superoxide eliminating agent comprising a component extracted from natural lichens or lichen cultures, and a process for producing the same. Cosmetics containing the superoxide eliminating agent are also disclosed.

Superoxide eliminating agent

Stable and safe cosmetic compositions comprising melanin production inhibitors wherein the melanin production inhibitors have been extracted lichens cell cultures.

Cosmetics

Disclosed is a chemically stable tyrosinase activity inhibitor having high tyrosinase activity inhibition effect and low toxicity. The tyrosinase activity inhibitor has a structure of the formula: ##STR1## wherein R.sub.1, R.sub.3 and R.sub.4 are a hydrogen atom or an alkyl or alkenyl group having 1 to 9 carbon atoms, and R.sub.2 is an alkyl or alkenyl group having 2 to 9 carbon atoms.

Tyrosinase activity inhibitor

Growing community of inventors

Takatsuki, Japan

Yasutaka Miura