4-Hydroxy-3,5-dimethoxy ring-substituted ethyl phenylcyanoacrylate (PCA) is reported as a component of sunscreen composition ; in the synthesis of some biologically potent heterocycles ; in synthesis of hierarchical porous layered hybrid materials based on aluminosilicate sheets and organic functional pillars ; in synthesis and biological evaluation of 3-aminopyrazolones ; in photostabilization of cosmetic UV filters ; in UV absorbing combination comprising a heptaazaphenalene ; in UV absorbing pharmaceutical and cosmetic compositions containing a pyrrolyltriazine ; in methods for stabilizing ingredients within cosmetics, personal care and household products ; in photostable organic sunscreen compounds with antioxidant properties ; in a study of main-chain and guest-host NLO polymers . 2,4,6-Trimethoxyphenyl ethyl PCA is involved in synthesis, characterization and heterogeneous base catalysis of amino functionalized lanthanide metal-organic frameworks ; in efficient MgBr2.OEt2catalyzed Knoevenagel condensation ; in coating composition comprising UVabsorbent and mixed solvent for release film . 2,4,6-Trimethoxy ring-substituted 1methylethyl PCA was mentioned in biochemical evaluation of virtual screening methods reveals a cell-active inhibitor of the cancer-promoting phosphatases of regenerating liver . 3,4,5-Trimethoxyphenyl ethyl PCA is reported in synthesis, antimicrobial and antitumor study of new pyrido[2,1-a]isoquinolines via isoquinoline-1-acetonitrile ; in a functionalized UiO-66 MOF for turn-on fluorescence sensing of superoxide in water and efficient catalysis for Knoevenagel condensation , and in highly efficient synthesis of pyranoquinoline derivatives catalyzed by piperidine .