for the following products
(2E)-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)-N,N-diethylprop-2-enamide | (E)-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)-N,N-diethylacrylamide | (E)-2-Cyano-3-(5-(dihydroxyamino)-3,4-dioxocyclohexa-1,5-dienyl)-N,N-diethylacrylamide and Entacapone
