176  US 8,968,979 B2  175  -continued  (D)-5  (D)-6  (D)-2  (\  R301  N-X  ’\__)  (X  Tj:;;"""  N  ----t- R3os _  CN)n  (D)-4  Illustrative examples of the organic nitrogen-containing  compounds having cyano represented by formulae (D)-3 to  (D)-6 include 3-( diethylamino )propiononitrile, N,N-bis(2- hydroxyethyl)-3-aminopropiononitrile, N,N-bis(2-acetoxy› ethyl)-3-aminopropiononitrile, N,N-bis(2-formyloxyethyl)- 3-aminopropiononitrile,  N,N-bis(2-methoxyethyl)-3- aminopropiononitrile, N,N-bis[2-(methoxymethoxy )ethyl]- 3-aminopropiononitrile,  methyl  N-(2-cyanoethyl)-N-(2- methoxyethyl)-3-aminopropionate,  methyl  N-(2- cyanoethyl)-N-(2-hydroxyethyl)-3-aminopropionate,  methyl N-(2-acetoxyethyl)-N-(2-cyanoethyl)-3-aminopropi- onate,  N-(2-cyanoethyl)-N-ethyl-3-aminopropiononitrile,  N-(2-cyanoethyl)-N-(2-hydroxyethyl)-3-aminopropiononi› trile,  N-(2-acetoxyethyl )-N-(2-cyanoethy 1)-3-aminopropi› ononitrile,  N-(2-cyanoethy 1)-N-(2-formyloxyethy I )-3-ami- nopropiononitrile, N-(2-cyanoethyl)-N-(2-methoxyethyl)-3- aminopropiononitrile,  N-(2-cyanoethyl)-N-[2- (methoxymethoxy)ethyl]-3-aminopropiononitrile,  N-(2- cyanoethyl)-N-(3-hydroxy-l-propyl)-3- aminopropiononitrile,  N-(3-acetoxy- l-propyl)-N-(2- cyanoethyl)-3-aminopropiononitrile,  N-(2-cyanoethyl)-N- (3-fanny loxy-1-propy I )-3-aminopropiononitrile,  N-(2- cyano~thy l)-N-tetrahydrofurfuryl-3-aminopropiononitrile,  N,N-b1s(2-cyanoethyl)-3-aminopropiononitrile, diethylami› noacet_onitrile,  N,N-bis(2-hydroxyethyl)aminoacetonitrile,  N,N-b1s(2-acetoxyethyl)aminoacetonitrile,  N,N-bis(2- formyloxyethyl)aminoacetonitrile,  N,N-bis(2-methoxy- ethyl)aminoacetonitrile,  N,N-bis[2-(methoxymethoxy)  ethyl]aminoacetonitrile,  methyl  N-cyanomethyl-N-(2- methoxyethy I )-3-aminopropionate, methy I N-cyanomethyl- N-(2-hydroxyethyl)-3-aminopropionate,  methyl  N-(2- acetoxyethy 1)-N-cyanomethy 1-3-aminopropionate,  N-cyanomethyl-N-(2-hydroxyethyl)aminoacetonitrile,  N-(2-acetoxyethy 1)-N-( cyanomethy l)aminoacetonitrile,  N-cyanomethy l-N-(2-fanny loxyethy l)aminoacetonitrile,  N-cyanomethyl-N-(2-methoxyethyl)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-diethylaminopropionate,  cyanomethyl  N,N-bis(2-hy› droxyethyl)-3-aminopropionate, cyanomethyl N,N-bis(2-ac› etoxyethyl)-3-aminopropionate,  cyanomethyl  N,N-bis(2- formyloxyethy I )-3-aminopropionate, cyanomethy I 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- Also, one or more organic nitrogen-containing compounds  having cyano group represented by the following general  formulae (D)-3 to (D)-6 may be blended.  Illustrative examples of the organic nitrogen-containing  compounds having formula (D)-2 include 1-[2-(meth› oxymethoxy )ethyl]pyrrolidine,  1-[2-(methoxymethoxy)  ethyl]piperidine, 4-[2-(methoxymethoxy)ethyl]morpholine,  1-[2-[ (2-methoxyethoxy )methoxy ]ethyl]pyrrolidine,  1-[2- [ (2-methoxyethoxy )methoxy ]ethyl]piperidine,  4-[2-[(2- methoxyethoxy )methoxy ]ethyl]morpholine, 2-(1-pyrrolidi› nyl)ethyl  acetate,  2-piperidinoethyl  acetate,  2-morpholinoethyl acetate, 2-(1-pyrrolidinyl)ethyl formate,  2-piperidinoethyl propionate, 2-morpholinoethyl acetoxyac› etate, 2-(1-pyrrolidinyl)ethyl methoxyacetate, 4-[2-(meth› oxycarbony loxy )ethyl ]morpholine, 1-[2-( t-butoxycarbony› loxy )ethyl ]piperidine, 4-[2-(2-methoxyethoxycarbonyloxy)  ethyl ]morpholine,  methy I  3-(1-pyrrolidiny I )propionate,  methyl 3-piperidinopropionate, methyl 3-morpholinopropi› onate, methyl 3-(thiomorpholino )propionate, methyl 2-me› thyl-3-(1-pyrrolidinyl)propionate, ethyl 3-morpholinopropi› onate,  methoxycarbonylmethyl  3-piperidinopropionate,  2-hydroxyethyl  3-(1-pyrrolidinyl)propionate,  2-acetoxy› ethyl 3-morpholinopropionate, 2-oxotetrahydrofuran-3-yl  3-( 1-pyrrolidinyl )propionate, tetrahydrofurfury I 3-morpholi› nopropionate, glycidyl 3-piperidinopropionate, 2-methoxy› ethyl 3-morpholinopropionate, 2-(2-methoxyethoxy)ethyl  3-( 1-pyrrolidinyl )propionate, buty 13-morpholinopropionate,  cyclohexy I 3-piperidinopropionate,  a-(  1-pyrrolidinyl )me› thy 1-y-butyrolactone, ~-piperidino-y-butyrolactone, ~-mor› pholino-o-valerolactone,  methyl  1-pyrrolidinylacetate,  methyl piperidinoacetate, methyl morpholinoacetate, methyl  thiomorpholinoacetate, ethyl 1-pyrrolidinylacetate, 2-meth› oxyethyl morpholinoacetate, 2-morpholinoethyl 2-methoxy› acetate,  2-morpholinoethyl  2-(2-methoxyethoxy)acetate,  2-morphol)noethy I 2-[2-(2-methoxyethoxy )ethoxy ]acetate,  2-morpholmoethyl hexanoate, 2-morpholinoethyl octanoate,  2-morpholinoethyl decanoate, 2-morpholinoethyl laurate,  2-morpholinoethyl myristate, 2-morpholinoethyl palmitate,  and 2-morpholinoethyl stearate.  Herein, X, R$^{307 }$and n are as defined above, and R$^{308 }$and R 309  are each independently a straight or branched C$_{1 }$-C$_{4 }$ alkylene  group.  Herein X is as defined above, and R 307  is a straight or  branched C$_{2}$ -C$_{20 }$alkylene group which may contain one or  more carbonyl, ether, ester or sulfide groups.  Also useful are one or more organic nitrogen-containing  compounds having cyclic structure represented by the follow- ing general formula (D)-2.  ( methoxycarbonylmethyl )amine,  N-hexy I-bis  (methoxycarbonylmethyl)amine, and ~-( diethylamino )-o› valerolactone. 