content_image/913852.jpg content_image/913855.jpg content_image/913856.jpg content_image/913858.jpg content_image/913857.jpg
[0493] Specific examples of suitable cations represented by Formula (ca-4) include cations represented by Formulae (ca-4-1) and (ca-4-2) shown below. 

<img src='content_image/913852.jpg'>

<img src='content_image/913855.jpg'>

<img src='content_image/913856.jpg'>

-continued 

(ca-3-5) 

(ca-3-6) 

<img src='content_image/913858.jpg'>

[0494] Further, as the cation represented by Formula (ca- 5), cations represented by Formulae (ca-5-1) to (ca-5-3) are also preferable. (ca-5-1) 

<img src='content_image/913857.jpg'>

