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.  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.  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.  -continued  ~  o......._ /o  l:3  I  (R2(0P)n)m  (1-8)  (R’)p  ~~)  ~><  (1-9)  kyot  R2(0P)n  (1-10)  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).  t> □ OOOO  CX>  co OJ  OJ <O  <()  CXDCco  cxP  o3  US 9,170,489 B2  77  78  1  represents an integer of 0 or more. 