| 摘要 |
Benzoxazole derivatives represented by the formula <IMAGE> wherein R is in the 5- or 6-position and is hydrogen or an alkyl group containing 1 to 4 carbon atoms and R1 and R2 are independently hydrogen, an alkyl group containing 1 to 4 carbon atoms or a group having the formula-(XO)n-H, wherein X is ethylene or ethylene substituted by methyl or ethyl and which contains a total of 2 to 4 carbon atoms and n is an integer of 1 to 10, at least one of R1 and R2 being other than hydrogen, or R1 and R2, taken together with the nitrogen to which they are attached, form a 5- to 7-membered, saturated heterocyclic ring, and cosmetically acceptable salts thereof. The subject compounds, in combination with a suitable cosmetic carrier, are useful as radiation absorbers, i.e., UV-A filters.
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