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In the above formulae, each of Ra independently represents a hydrogen atom, an alkyl group, or a group represented by -CH$_{2}$---0-Ra$_{2}$ , wherein Ra$_{2 }$ represents a hydrogen atom, an alkyl group or an acyl group. 

R$_{1 }$ represents an (n+l)-valent organic group. 

In the case where m is equal to or greater than 2, each R$_{2 }$ independently represents a single bond or an (n+l)-valent organic group. 

Each OP independently represents the above-described group of decomposing by the action of an acid to generate an alcoholic hydroxyl group. In the case of n being equal to or greater than 2 and/or m being equal to or greater than 2, two or more OP’s may be bonded to each other and form a ring. 

Each of n and m represents an integer of 1 or more. When R$_{2 }$represents a single bond in formula (I-2), (I-3) or (I-8), nis 1. 

1 represents an integer of 0 or more. 

L$_{1 }$ represents a linking group represented by -COO-, -OCO-, ----CONH-, -0-, -Ar-, -SO$_{3}$ -, or -SO$_{2}$NH-, wherein Ar represents a divalent aromatic ring group. 

Ra represents a hydrogen atom or an organic group. 

L$_{3 }$ represents an (m+2)-valent linking group. 

Each RL represents an (n+l)-valent linking group in the case where m is equal to or greater than 2. 

Each Rs independently represents a substituent in the case where p is equal to or greater than 2. In the case where p is equal to or greater than 2, a plurality ofRs’s may be bonded to each other to form a ring. 

p represents an integer of0 to 3. 

Ra represents a hydrogen atom, an alkyl group, or a group represented by ----CH$_{2}$---0-Ra$_{2}$ . Ra$_{2 }$preferably represents a hydrogenatomoranalkylgrouphaving 1 to l0carbonatoms, and more preferably a hydrogen atom or a methyl group. 

-continued 

R$_{2 }$ represents a single bond or an (n+l)-valent organic group. R$_{2 }$ preferably represents a single bond or a non-aro› matic hydrocarbon group. In this case, R$_{2 }$may be a chain-like hydrocarbon group or may be an alicyclic hydrocarbon group. 

When R$_{1 }$and/or R$_{2 }$are a chain-like hydrocarbon group, the chain-like hydrocarbon group may be a straight chain or a branched chain. The carbon atom number of the chain-like hydrocarbon group is preferably 1 to 8. For example, when R$_{1 }$ and/or R$_{2 }$ represent an alkylene group, R$_{1 }$and/or R$_{2 }$ are pref› erably a methylene group, an ethylene group, an n-propylene group, an isopropylene group, an n-butylene group, an isobu› tylene group or a sec-butylene group. 

When R$_{1 }$and/or R$_{2 }$are an alicyclic hydrocarbon group, the alicyclic hydrocarbon group may be monocyclic or polycy› clic. The alicyclic hydrocarbon group takes a monocyclic, bicyclic, tricyclic or tetracyclic structure. The carbon atom number of the alicyclic hydrocarbon group is generally 5 or more, preferably 6 to 30, and more preferably 7 to 25. 

As the alicyclic hydrocarbon group, for example, those having the following partial structures are exemplified. Each of these partial structures may have a substituent. Further, in each of the partial structures, the methylene group (-CH$_{2}$ -) may be substituted with an oxygen atom (-0-), a sulfur atom (-S-), a carbonyl group [----C(=O)-], a sulfonyl group [-S(=O)$_{2}$ -], a sulfinyl group [-S(=O)-], or an imino group [-N(R)-] (wherein R represents a hydrogen atom or an alkyl group). 

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