273  US 9,411,230 B2  274  long as it is a low molecular compound having a group  capable of leaving by the action of an acid.  In formula (F), Ra represents a hydrogen atom, an alkyl  group, a cycloalkyl group, an aryl group or an aralkyl group.  Also, when n=2, two Ra’s may be the same or different, and  two Ra’s may combine with each other to form a divalent  heterocyclic hydrocarbon group (preferably having a carbon  number of 20 or less) or a derivative thereof.  Each Rb independently represents a hydrogen atom, an  alkyl group, a cycloalkyl group, an aryl group, an aralkyl  group or an alkoxyalkyl group, provided that when one or  more Rb in -C(Rb )(Rb )(Rb) are a hydrogen atom, at least  one ofremaining Rb is a cyclopropyl group, a 1-alkoxyalkyl  group or an aryl group.  At least two Rb’ s may combine to form an alicyclic hydro› carbon group, an aromatic hydrocarbon group, a heterocyclic  hydrocarbon group or a derivative thereof.  n represents an integer of Oto 2, m represents an integer of  1 to 3, and n+m=3.  In formula (F), the alkyl group, cycloalkyl group, aryl  group and aralkyl group represented by Ra and Rb may be  substituted with a functional group such as hydroxyl group,  cyano group, amino group, pyrrolidino group, piperidino  group, morpholino group and oxo group, an alkoxy group or  a halogen atom. The same applies to the alkoxyalkyl group  represented by Rb.  Examples of the alkyl group, cycloalkyl group, aryl group  and aralkyl group (each of these alkyl group, cycloalkyl  group, aryl group and aralkyl group may be substituted with  the above-described functional group, an alkoxy group or a  halogen atom) of Ra and/or Rb include:  a group derived from a linear or branched alkane such as  methane, ethane, propane, butane, pentane, hexane, heptane,  octane, nonane, decane, undecane and dodecane, or a group  where the group derived from an alkane is substituted with  one or more kinds of or one or more groups of cycloalkyl  group such as cyclobutyl group, cyclopentyl group and cyclo› hexyl group;  a group derived from a cycloalkane such as cyclobutane,  cyclopentane, cyclohexane, cycloheptane, cyclooctane, nor› bomane, adamantane and noradamantane, or a group where  the group derived from a cycloalkane is substituted with one  or more kinds of or one or more groups oflinear or branched  alkyl group such as methyl group, ethyl group, n-propyl  group, i-propyl group, n-butyl group, 2-methylpropyl group,  1-methylpropyl group and tert-butyl group;  a group derived from an aromatic compound such as ben› zene, naphthalene and anthracene, or a group where the group  derived from an aromatic compound is substituted with one or  more kinds of or one or more groups of linear or branched  alkyl group such as methyl group, ethyl group, n-propyl 60  group, i-propyl group, n-butyl group, 2-methylpropyl group,  1-methylpropyl group and tert-butyl group;  a group derived from a heterocyclic compound such as  pyrrolidine, piperidine, morpholine, tetrahydrofuran, tet› rahydropyran, indole, indoline, quinoline, perhydroquino- line, indazole and benzimidazole, or a group where the group  derived from a heterocyclic compound is substituted with one  5  or more kinds of or one or more groups oflinear or branched  alkyl group or aromatic compound-derived group; a group  where the group derived from a linear or branched alkane or  the group derived from a cycloalkane is substituted with one  or more kinds of or one or more groups of aromatic com› pound-derived group such as phenyl group, naphthyl group  and anthracenyl group; and a group where the substituent  above is substituted with a functional group such as hydroxyl  group, cyano group, amino group, pyrrolidino group, piperi- lO dino group, morpholino group and oxo group.  Examples of the divalent heterocyclic hydrocarbon group  (preferably having a carbon number of 1 to 20) formed by  combining Ra’s with each other or a derivative thereof  include a group derived from a heterocyclic compound such  as pyrrolidine, piperidine, morpholine, 1,4,5,6-tetrahydropy› rimidine, 1,2,3,4-tetrahydroquinoline, 1,2,3,6-tetrahydropy› ridine, homopiperazine, 4-azabenzimidazole, benzotriazole,  5-azabenzotriazole,  lH-1,2,3-triazole,  1,4, 7-triazacy- clononane, tetrazole, 7-azaindole, indazole, benzimidazole,  imidazo[l ,2-a ]pyridine, (1 S,4S)-( + )-2,5-diazabicyclo[2.2.1]  heptane, 1,5, 7-triazabicyclo[ 4.4.0]dec-5-ene, indole, indo› line, 1,2,3,4-tetrahydroquinoxaline, perhydroquinoline and  1,5,9-triazacyclododecane, and a group where the group  derived from a heterocyclic compound is substituted with one  or more kinds of or one or more groups oflinear or branched  alkane-derived group, cycloalkane-derived group, aromatic  compound-derived group, heterocyclic compound-derived  group, and functional group such as hydroxyl group, cyano  group, amino group, pyrrolidino group, piperidino group,  morpholino group and oxo group.  Specific examples of the compound (D) particularly pre› ferred in the present invention are illustrated below, but the  present invention is not limited thereto.  GN~)(/  (D-1)  GN~O~  (D-2)  GN~O)y  (D-3)  GN~Of>  (D-4)  GN~O)(  (D-5)  (F) 