[EN] PHOTOPROTECTIVE COMPOSITIONS BASED ON METHYLTRIALKYLSILANES CONTAINING A CINNAMATE, CINNAMAMIDE, BENZALMALONAMIDE OR BENZALMALONATE FUNCTION [FR] COMPOSITIONS PHOTOPROTECTRICES A BASE DE METHYLTRIALKYLSILANES POSSEDANT UNE FONCTION CINNAMATE, CINNAMAMIDE, BENZALMALONAMIDE OU BENZALMALONATE