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[0216] [In the formulae, R $^{11201 }$represents a hydrogen atom or a substituent. Examples of the substituent include those 

-continued 

(ca-1-21) 

(ca-1-22) 

(ca-1-23) 

(ca-1-24) 

exemplified as the substituents which may be included in R201 to R207 and R210 to R212_ ] 

[0217] Further, as the cation represented by Formula (ca› l), cations represented by Formulae ( ca-1-25) to ( ca-1-35) are also preferable. 

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(ca-1-25) 

(ca-1-26) 

(ca-1-27) 

(ca-1-28) 

