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N-cyanomethy 1-N-(2-fanny loxyethy l)aminoacetonitrile, N-cyanomethy 1-N-(2-methoxyethy l)aminoacetonitrile, N-cyanomethy 1-N-[2-(methoxymethoxy )ethy l)aminoaceto› nitrile, N-cyanomethyl-N-(3-hydroxy-l-propyl)aminoaceto› nitrile, N-(3-acetoxy-l-propyl)-N-(cyanomethyl)aminoac- etonitrile, N-cyanomethyl-N-(3-formyloxy-l-propyl) aminoacetonitrile, N,N-bis( cyanomethyl )aminoacetonitrile, 1-pyrrolidinepropiononitrile, 1-piperidinepropiononitrile, 4-morpholinepropiononitrile, 1-pyrrolidineacetonitrile, 1-pi› peridineacetonitrile, 4-morpholineacetonitrile, cyanomethyl 3-diethy laminopropionate, cyanomethy I N ,N-bis(2-hy› droxyethy l)-3-aminopropionate, cyanomethyl N,N-bis(2-ac› etoxyethyl)-3-aminopropionate, cyanomethyl N,N-bis(2- formyloxyethyl)-3-aminopropionate, cyanomethyl N,N-bis (2-methoxyethyl)-3-aminopropionate, cyanomethyl N,N-bis [2-(methoxymethoxy )ethy l]-3-aminopropionate, 2-cyanoethyl 3-diethylaminopropionate, 2-cyanoethyl N,N› bis(2-hydroxyethyl)-3-aminopropionate, 2-cyanoethyl N,N› bis(2-acetoxyethyl)-3-aminopropionate, 2-cyanoethyl N,N- bis(2-formyloxyethyl)-3-aminopropionate, 2-cyanoethyl N,N-bis(2-methoxyethyl)-3-aminopropionate, 2-cyanoethyl N,N-bis [2-( methoxymethoxy )ethyl ]-3-aminopropionate, cyanomethyl 1-pyrrolidinepropionate, cyanomethyl 1-pip› eridinepropionate, cyanomethyl 4-morpholinepropionate, 2-cyanoethyl 1-pyrrolidinepropionate, 2-cyanoethyl 1-pip› eridinepropionate, and 2-cyanoethyl 4-morpholinepropi› onate. 

Also included are amine compounds of imidazole structure having a polar functional group, represented by the general formula (Am-7). 

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Herein, R 311 is a straight, branched or cyclic C$_{2}$-C$_{20 }$ alkyl group in which some or all hydrogen atoms may be substi› tuted by fluorine atoms and which has one or more polar functional groups. The polar functional group is selected from among hydroxyl, carbonyl, ester, ether, sulfide, carbon› ate, cyano and acetal groups and mixtures thereof. R 312 , R 313 and R$^{314 }$are each independently a hydrogen atom, a straight, branched or cyclic C$_{1 }$-C$_{10 }$alkyl group, aryl group or aralkyl group. 

Also included are amine compounds of benzimidazole structure having a polar functional group, represented by the general formula (Am-8). 

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Herein, R$^{315 }$is a straight, branched or cyclic C$_{1}$-C$_{20 }$ alkyl group in which some or all hydrogen atoms may be substi- 

tuted by fluorine atoms and which has one or more polar functional groups. The alkyl group contains as the polar func› tional group at least one group selected from among ester, acetal and cyano groups, and may additionally contain at least one group selected from among hydroxyl, carbonyl, ether, sulfide and carbonate groups. R$^{316 }$is a hydrogen atom, a straight, branched or cyclic C$_{1 }$-C$_{10 }$alkyl group, aryl group or aralkyl group. 

Further included are heterocyclic nitrogen-containing compounds having a polar functional group, represented by the general formulae (Am-9) and (Am-10). 

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Herein, J is a nitrogen atom or C-R 323 . K is a nitrogen atom or C-R 324 . R $^{317 }$is a straight, branched or cyclic C$_{2}$-C$_{20 }$alkyl group in which some or all hydrogen atoms may be substituted by fluorine atoms and which has one or more polar functional groups, the polar functional group being selected from among hydroxyl, carbonyl, ester, ether, sulfide, carbonate, cyano and acetal groups and mixtures thereof. R 318 , R 319 , R $^{320 }$and R$^{321 }$are each independently a hydrogen atom, a straight, branched or cyclic C$_{1 }$-C$_{10 }$alkyl group or aryl group, or a pair ofR$^{318 }$and R$^{319 }$and a pair ofR$^{320 }$and R 321 , taken together, may form a benzene, naphthalene or pyridine ring with the carbon atoms to which they are attached. R$^{322 }$is a hydrogen atom, a straight, branched or cyclic C$_{1 }$-C$_{10 }$alkyl group or aryl group. R$^{323 }$and R$^{324 }$each are a hydrogen atom, a straight, branched or cyclic C$_{1 }$-C$_{10 }$ alkyl group or aryl group, or a pair ofR$^{322 }$and R 324 , taken together, may form a benzene or naphthalene ring with the carbon atoms to which they are attached. 

Also included are amine compounds having an aromatic carboxylic acid ester structure, represented by the general formulae (Am-11) to (Am-14). 

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