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ethy lundecy !amine, N,N-dimethy ldodecy !amine, methy 1 dioctadecylamine, N,N-dibutylaniline, N,N-dihexylaniline, 2,6-diisopropylaniline, and 2,4,6-tri(t-butyl)aniline. 

In addition, as the preferable basic compound represented by General Formula (BS-1), an alkyl group in which at least one R is substituted with a hydroxy group is exemplified. Specific examples thereof include triethanolamine and N,N› dihydroxyethylaniline. 

Moreover, the alkyl group as R may have an oxygen atom in the alkyl chain. That is, an oxyalkylene chain may be formed. As the oxyalkylene chain. ----CH$_{2}$CH$_{2}$ 0- is pref› erable. Specific examples thereof include tris(methoxy› ethoxyethyl)amine and a compound disclosed after line 60 of colunm 3 in the specification of U.S. Pat. No. 6,040,112. 

Examples of the basic compound represented by General Formula (BS-1) include the following ones. 

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(2) Compound Having Nitrogen-Containing Heterocyclic Structure 

The nitrogen-containing heterocycle may have aromatic properties, or may not have aromatic properties. The nitro- gen-containing heterocycle may have a plurality of nitrogen atoms. Furthermore, the nitrogen-containing heterocycle may contain heteroatoms other than the nitrogen atom. Specific examples thereof include a compound having an imidazole structure (2-phenylbenzimidazole, 2,4,5-triph› enylimidazole and the like), a compound having a piperidine structure [N-hydroxyethylpiperidine, bis(l ,2,2,6,6-pentam› ethyl-4-piperidyl)sebacate, and the like], a compound hav› ing a pyridine structure (4-dimethylaminopyridine and the like), and a compound having an antipyrine structure (anti› pyrine, hydroxyantipyrine, and the like). 

Furthermore, a compound having two or more ring struc› tures is suitably used. Specific examples thereof include 1,5-diazabicyclo[ 4.3.0]non-5-ene and 1,8-diazabicyclo [5.4.0]undeca-7-ene. 

(3) Ammonium Salt 

An ammonium salt can also be appropriately used as the basic compound. Examples of the anion of the animonium salt include halide, sulfonate, borate, and phosphate. Among these, halide and sulfonate are particularly preferable. 

As the halide, chloride, bromide, or iodide is particularly preferable. 

