14  US 7,410,747 B2  13  (Ila!)  OMO  ..+--,  Q CH2 v  ~  (R11-2l,•-- (Ilbl)  (Ile!)  (Ildl)  (Ile!)  (Ilb)  (Ild)  (Ile)  -continued  In formulae (Ila) to (Ile),  RII_$_{1}$ ,  RII_$_{2}$ ,  L$_{1 }$ and L$_{2 }$ have the  same meanings as in formula Examples of the organic group  of X 3  are the same as those of the organic group for X in  formula  (I).  Examples of the divalent linking group ofY  $_{2 }$are the same as those for L$_{1 }$ in formula (II). The ring structure which may  be formed by combining  RII_$_{2 }$ and R$_{2 }$ may be monocyclic or  polycyclic and may be an alicyclic hydrocarbon group or an  aryl group. Examples of the alicyclic hydrocarbon group are  the same as those of the alicyclic moiety which can be con- tained in the organic group of X$_{1 }$ described later. Preferred  examples of the aryl group include a phenyl group, a xylyl  group, a toluyl group, a cumenyl group, a naphthyl group and  an anthracenyl group.  Y$_{5 }$ represents a linking group represented by ---0-,  -S- or ----C(Rm)CRm)-.  Rm  and  R,,  each independently  represents an alkyl group, a cycloalkyl group, a halogen atom,  an ary  1  group, an aralky  1  group, an alkoxy group or an acy loxy  group, provided that the alkyl group and the aralkyl group  each may have an intervening linking group represented by  -0-, -S-, -CO$_{2}$-, -CO-, -S0 2 - or -SO-.  u represents 0 or 1, p’ represents an integer of0 to 6, q’ each  independently represents an integer of Oto 4, r’ represents an  integer of0 to 5, s’ represents an integer of0 to 5, and t’ each  independently represents an integer of 0 to 4, provided that  r+s is 5 or less.  The repeating unit represented by formula (II) is more  preferably a repeating unit represented by any one of formu› lae (Hal) to (IIel ):  Specific examples of the repeating unit represented by  formula (II) are set forth below, but the present invention is  not limited thereto.  RII_$_{1}$ ,  RII_$_{2}$ ,  Li, L$_{2}$ ,  X1, X$^{2 }$andX$^{3 }$each has the same mean› ing as above,  Y $_{6 }$ represents a linking group represented by  -CH$_{2}$ - or  ----CO-O-,  v represents 0 or 1, and  s" each independently represents an integer of0 to 4.  In formulae (Hal) to (IIel), 