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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 organic nitrogen-containing compounds of imidazole structure having a polar functional group, rep› resented by the general formula (D )-7. 

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Herein, R$^{310 }$is a straight, branched or cyclic C$_{2}$-C$_{20 }$ alkyl group bearing at least one polar functional group selected 25 from among hydroxyl, carbonyl, ester, ether, sulfide, carbon› ate, cyano and acetal groups; R 311 , R $^{312 }$and R$^{313 }$are each independently hydrogen, a straight, branched or cyclic C$_{1 }$-C$_{10 }$alkyl group, aryl group or aralkyl group. 30 

Also included are organic nitrogen-containing compounds of benzimidazole structure having a polar functional group, represented by the general formula (D)-8. 

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Herein, R 314 is hydrogen, a straight, branched or cyclic C$_{1 }$-C$_{10 }$ alkyl group, aryl group or aralkyl group. R$^{315 }$is a polar functional group-bearing, straight, branched or cyclic C$_{1 }$-C$_{20 }$alkyl group, and the alkyl group contains as the polar functional 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. 

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

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Herein, A is a nitrogen atom or C-R 322 , Bis a nitrogen atom or C-R 323 , R $^{316 }$is a straight, branched or cyclic C$_{2}$-C$_{20 }$alkyl group bearing at least one polar functional group selected from among hydroxyl, carbonyl, ester, ether, sulfide, carbonate, cyano andacetal groups; R 317 , R 318 , R $^{319 }$andR320 are each independently hydrogen, a straight, branched or cyclic C$_{1 }$-C$_{10 }$alkyl group or aryl group, or a pair ofR$^{317 }$and R$^{318 }$and a pairofR$^{319 }$andR$^{320 }$may bond together to form a benzene, naphthalene or pyridine ring with the carbon atom to which they are attached; R 321 is hydrogen, a straight, branched or cyclic C$_{1 }$-C$_{10 }$alkyl group or aryl group; R$^{322 }$and R$^{323 }$each are hydrogen, a straight, branched or cyclic C$_{1 }$-C$_{10 }$ alkyl group or aryl group, or a pair ofR$^{321 }$and R$^{323 }$may bond together to form a benzene or naphthalene ring with the carbon atom to which they are attached. 

Also included are organic nitrogen-containing compounds of aromatic carboxylic ester structure having the general for› mulae (D)-11 to (D)-14. 

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Herein R$^{324 }$is a CcC$_{20 }$ aryl group or C$_{4}$ -C$_{20 }$hetero-aromatic group, in which some or all of hydrogen atoms may be replaced by halogen atoms, straight, branched or cyclic C$_{1 }$-C$_{20 }$ alkyl groups, CcC$_{20 }$ aryl groups, C$_{7}$ -C$_{20 }$ aralkyl groups, C$_{1 }$-C$_{10 }$ alkoxy groups, C$_{1 }$-C$_{10 }$ acyloxy groups or C$_{1}$-C$_{10 }$ alkylthio groups. R$^{325 }$is CO$_{2}$R 326 , OR $^{327 }$or cyano group. R$^{326 }$is a C$_{1 }$-C$_{10 }$alkyl group, in which some methylene groups may be replaced by oxygen atoms. R$^{327 }$is a C$_{1 }$-C$_{10 }$ alkyl or acyl group, in which some methylene groups may be replaced by oxygen atoms. R$^{328 }$is a single bond, methylene, ethylene, sulfur atom or ---0( CH$_{2}$CH$_{2 }$0 )n - group wherein n 

