US 9,557,643 B2  258  257  The composition of the present invention may contain, as  the basic compound, a low molecular compound having a  nitrogen atom and having a group capable of leaving by the  action of an acid (hereinafter, sometimes referred to as "low  molecular compound (D)" or "component (D)").  The group capable of leaving by the action of an acid is  not particularly limited but is preferably an acetal group, a  carbonate group, a carbamate group, a tertiary ester group,  a tertiary hydroxyl group or a hemiaminal ether group, more  preferably a carbamate group or a hemiaminal ether group.  The molecular weight of the compound (D) is preferably  from 100 to 1,000, more preferably from 100 to 700, still  more preferably from 100 to 500.  The compound (D) is preferably an amine derivative  having on the nitrogen atom a group capable of leaving by  the action of an acid.  The compound (D) may have a protective group-contain› ing carbamate group on the nitrogen atom. The protective  group constituting the carbamate group can be represented,  for example, by the following formula (d-1):  In formula (d-1), each R’ independently represents a  hydrogen atom, a linear or branched alkyl group, a  cycloalkyl group, an aryl group, an aralkyl group or an  alkoxyalkyl group. Each R’ may combine with every other  R’ to form a ring.  R’ is preferably a linear or branched alkyl group, a  cycloalkyl group or an aryl group, more preferably a linear  or branched alkyl group or a cycloalkyl group.  Specific structures of this group are illustrated below.  -continued  00X0)(/  0)C~0ok  00~00Xy  (d-1) 