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LCl-5 

LCl-6 

LCl-7 

LCl-8 

LCl-9 

LCl-10 

LCl-11 

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[0197] The lactone structure portion or the sultone structure portion may have or may not have a substituent (Rb$_{2}$ ). Pref› erable examples of the substituent (Rb$_{2}$ ) include an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 

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LCl-12 

LCl-13 

LCl-14 

LCl-15 

LCl-16 

LCl-17 

SLl-1 

SLl-2 

