A compound represented by general formula (c1) (R
1
represents an alicyclic group of 5 or more carbon atoms which may have a substituent; X represents a divalent linking group; Y represents a linear, branched or cyclic alkylene group or an arylene group; Rf represents a hydrocarbon group containing a fluorine atom; and M
+
represents an organic cation or a metal cation).
一个由一般公式表示的化合物(c1)(R1代表一个含有5个或更多碳原子的脂环基团,可能带有取代基; X代表双价连接基团; Y代表线性、支链或环烷基团或芳基团; Rf代表含有
氟原子的烃基团; M+代表有机阳离子或
金属阳离子)。