96  US 9,551,933 B2  95  -continued  -continued  For example, when R$_{1 }$ and/or R$_{2 }$ are a cycloalkylene  group, R$_{1 }$ and/or R$_{2 }$ are preferably an adamantylene group,  a noradamantylene group, a decahydronaphthylene group, a  tricyclodecanylene group, a tetracyclododecanylene group,  a norbornylene group, a cyclopentylene group, a cyclohex› ylene group, a cycloheptylene group, a cyclooctylene group,  a cyclodecanylene group or a cyclododecanylene group,  more preferably an adamantylene group, a norbornylene  group, a cyclohexylene group, a cyclopentylene group, a  tetracyclododecanylene group  or a  tricyclodecanylene  group.  The non-aromatic hydrocarbon group ofR$_{1 }$and/or R$_{2 }$ may  have a substituent. Examples of this substituent include an  alkyl group having a carbon number of  1  to  4,  a halogen  atom, a hydroxy group, an alkoxy group having a carbon  number of  1  to  4,  a carboxy group, and an alkoxycarbonyl  group having a carbon number of 2 to 6. These alkyl group,  alkoxy group and alkoxycarbonyl group may further have a  substituent, and examples of the substituent include a  hydroxy group, a halogen atom, and an alkoxy group.  L$_{1 }$ represents a linking group represented by  --COO-,  ---OCO-, -CONH-,  ---0-,  -Ar-,  -S0$_{3}$ - or  -S0$_{2}$ NH-,  wherein  Ar  represents a divalent aromatic ring  group. L$_{1 }$ is preferably a linking group represented by  --COO-, ----CONH- or  -Ar-,  more preferably a link› ing group represented by  --COO- or  ----CONH-.  R represents a hydrogen atom or an alkyl group. The alkyl  group may be linear or branched. The carbon number of this  alkyl group is preferably from  1  to 6, more preferably from  1  to 3. R is preferably a hydrogen atom or a methyl group,  more preferably a hydrogen atom.  R$_{0 }$ represents a hydrogen atom or an organic group.  Examples of the organic group include an alkyl group, a  cycloalkyl group, an aryl group, an alkynyl group, and an  alkenyl group. R$_{0 }$ is preferably a hydrogen atom or an alkyl  group, more preferably a hydrogen atom or a methyl group.  L$_{3 }$ represents an (m+2)-valent linking group. That is, L$_{3 }$ represents a trivalent or higher valent linking group.  Examples of such a linking group include corresponding  groups in specific examples illustrated later.  RL  represents an (n+l)-valent linking group. That is,  RL  represents a divalent or higher valent linking group. 