Oxytocyclene: An ingredient in sunscreens and cosmetics

I.U.P.A.C:2-ethylhexyl 2-cyano-3,3-diphenyl-2-propenoate

The mesomeric system of the molecule's many conjugated double bonds absorbs ultraviolet rays while protecting the skin. However, by aging this substance is probably transformed to carcinogenic benzophenone:

I.U.P.A.C: diphenylmethanone