Photoresponsive sunscreen compositions

摘要

The disclosure provides sunscreen compositions comprising a carrier for topical administration and photoresponsive first sunscreen agents which are capable of undergoing intramolecular photorearrangements to form second sunscreen agents. The second sunscreen agents absorb more ultraviolet radiation than the first sunscreen agents. The sunscreen composition may comprise the prephotorearrangement first sunscreen agent, the photorearranged second sunscreen agent, a combination of the first and second sunscreen agents, or any of the above in combination with a known sunscreen agent.