Tyrosinase activity inhibitor
AssigneeNippon Paint Co., Ltd.
InventorsYasutaka Miura, Yasuhiro Kinoshita, Yoshikazu Yamamoto, Kunio Takahashi, Kiyotaka Koyama, Kaoru Takatori
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Abstract
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.
Claims8
A method for inhibiting tyrosinase activity in which a compound represented as follows is used:
- ##STR6## wherein R.sub.3 and R.sub.4 are a hydrogen atom or an alkyl or alkenyl group having 1 to 9 carbon atoms.
A method of inhibiting tyrosinase activity comprising applying to the skin a cosmetic composition comprising a compound having the formula:
- ##STR7## wherein R.sub.3 and R.sub.4 are hydrogen or alkyl or alkenyl having 1 to 9 carbon atoms.
Dependencies are inferred from the claim text.