Rr 13  is preferably a hydrogen atom, a chain-like alkyl  group of  1  to 15 carbon atoms which may have a substituent,  a cyclic alkyl group of3 to 20 carbon atoms which may have  a substituent, or an aromatic hydrocarbon group of 5 to 20  carbon atoms which may have a substituent, is more prefer› ably a cyclic alkyl group of3 to 20 carbon atoms which may  have a substituent, and is still more preferably a polycyclic  cyclic alkyl group.  In formula (gl-3),  Rr 13 , Rr 23  and Rr3 3  are the same as  defined above for Rr 1 , Rr2 and Rr 3  respectively in general  formula (gl).  In formula (gl-2), Rr 12 , Rr $^{22 }$and Rr3 2 are the same as  defined above for Rr 11 , Rr $^{21 }$and Rr$^{31 }$respectively in general 55  formula (gl-1).  It  is preferable that Rr2 $^{1 }$and Rr$^{31 }$are either both hydrogen 50  atoms, or are bonded to each other to form a ring, and it is  particularly desirable that R 21  and R 31  are both hydrogen  atoms.  Rr 11  is preferably a hydrogen atom, a chain-like alkyl  group of  1  to 15 carbon atoms which may have a substituent,  a cyclic alkyl group of3 to 20 carbon atoms which may have  a substituent, or an aromatic hydrocarbon group of 5 to 20  carbon atoms which may have a substituent, and is more  preferably a chain-like alkyl group of  1  to 15 carbon atoms  which may have a substituent or an aromatic hydrocarbon  group of 5 to 20 carbon atoms which may have a substituent.  In formula (gl-1),  Rr 11 , Rr 21  and Rr3 1  are the same as  defined above for  Rr 1 , Rr2 and Rr 3  respectively in general  formula (gl).  In the formulas, Rr$^{11 }$represents a hydrogen atom or a hydro› carbon group of  1  to 20 carbon atoms which may have a  substituent, each ofRr2$^{1 }$and Rr$^{31 }$independently represents a  hydrogen atom or a hydrocarbon group of  1  to 20 carbon  atoms which may have a substituent, and Rr2 $^{1 }$and Rr$^{31 }$may  be bonded to each other to form a ring. Rr$^{12 }$represents a  hydrogen atom or a hydrocarbon group of  1  to 20 carbon  atoms which may have a substituent, each of  Rr $^{22 }$and Rr3 2  independently represents a hydrogen atom or a hydrocarbon  group of  1  to 20 carbon atoms which may have a substituent,  and Rr2$^{2 }$and Rr$^{32 }$may be bonded to each other to form a ring.  Rr $^{13 }$represents a hydrogen atom or a hydrocarbon group of  1  to 20 carbon atoms which may have a substituent, each of  Rr $^{23 }$and Rr3 $^{3 }$independently represents a hydrogen atom or a  hydrocarbon group of  1  to 20 carbon atoms which may have  a substituent, and  Rr $^{23 }$and Rr$^{33 }$may be bonded to each other  to form a ring.  [Chemical Formula 50]  It  is preferable that Rr2$^{3 }$and Rr$^{33 }$are either both hydrogen  atoms, or are bonded to each other to form a ring, and it is  particularly desirable that Rr2 3  and Rr3 3  are both hydrogen  atoms.  [Compound (G2)]  In formula (g2), examples of the hydrocarbon group ofl to  20 carbon atoms which may have a substituent for Rs $^{1 }$include  the same groups as those described above for  Rr 1  in the  aforementioned general formula (g  1).  Rs 1  is preferably a fluorine atom or a fluorinated alkyl  group.  The fluorinated alkyl group for Rs $^{1 }$is a group in which part  or all of the hydrogen atoms of an alkyl group have each been  substituted with a fluorine atom, wherein the alkyl group may  be either a chain-like group or a cyclic group. Examples of the  chain-like alkyl group include the same chain-like alkyl  groups as those mentioned above within the description relat› ing to  Rr $^{1 }$in general formula (gl ), and chain-like alkyl groups  having  1  to 15 carbon atoms are preferable. Examples of the  cyclic alkyl group include the same cyclic alkyl groups as  those mentioned above within the description relating to  Rr 1  in general formula (g  1  ),  and cyclic alky  1  groups having 3 to 20  carbon atoms are preferable.  The fluorinated alkyl group is preferably a chain-like flu- orinated alkyl group having  1  to 15 carbon atoms, more  preferably  1  to  11  carbon atoms, still more preferably  1  to 8  carbon atoms, and most preferably  1  to  4  carbon atoms.  Specific examples include groups in which part or all of the  hydrogen atoms that constitute a linear alkyl group such as a  methyl group, ethyl group, propyl group, butyl group, pentyl  group, hexyl group, heptyl group, octyl group, nonyl group or  decyl group have each been substituted with a fluorine atom,  and groups in which part or all of the hydrogen atoms that  constitute a branched alkyl group such as a 1-methylethyl  group, 1-methylpropyl group, 2-methylpropyl group, 1-me› thylbutyl group, 2-methylbutyl group or 3-methylbutyl group  have each been substituted with a fluorine atom.  Further, the fluorinated alky  1  group for Rs $^{1 }$may include an  atom other than the carbon, hydrogen and fluorine atoms.  Examples of this atom other than the carbon, hydrogen and  fluorine atoms include an oxygen atom, a sulfur atom and a  nitrogen atom.  The fluorinated alkyl group for Rs$^{1 }$is preferably a group in  which part or all of the hydrogen atoms that constitute a linear  alkyl group have each been substituted with a fluorine atom.  A group in which all of the hydrogen atoms that constitute a  linear alkyl group have each been substituted with a fluorine  atom (namely, a perfluoroalkyl group) is particularly desir- able.  Rs$^{2 }$and Rs$^{3 }$are the same as defined above for Rr2 and Rr 3  in general formula (gl).  Examples of the fluorinated alkyl group for Rs $^{4 }$include the  same groups as those mentioned above for the fluorinated  alky  1  group for Rs  1 .  m may be either  O  or  1.  [Compound (G3)]  In formula (g3), examples of the chain-like alkyl group of  1  to 15 carbon atoms and the cyclic alkyl group of 3 to 20  carbon atoms for Rt 1  include the same groups as those  described above for the chain-like alkyl group and cyclic  alkyl group for  Rr 1  in the aforementioned general formula  (gl).  Among the above possibilities, Rt 1  is preferably a chain› like or cyclic alkyl group of  1  to 15 carbon atoms, more  preferably a chain-like alkyl group of  1  to 5 carbon atoms or  a cyclic alkyl group of 5 to  10  carbon atoms, and most pref› erably a methyl group.  US 9,164,380 B2  117  118  0  Rrll/000H  Ri21  Rr31  (gl-1)  0  .,,,.s~  l  Rr12  A __ ....... OH  Ri22  Rr32  (gl-2)  (gl-3) 