44  US 7,410,747 B2  43  [3] Nitrogen-Containing Basic Compound (C)  In the present invention, a nitrogen-containing basic com- pound is preferably used from the standpoint of, for example,  enhancing the performance such as resolving power or elevat- ing the storage stability.  The nitrogen-containing basic compound usable in the  present invention is preferably a compound having basicity  stronger than phenol.  The preferred chemical environment thereof includes  structures of the following formulae (A) to (E). The structures  of formulae (B) to (E) each may form a part ofa ring structure.  (C)  I  I  =C-N=C- (A)  R2s1  I  R2so_ N-R2s2  I I  (B)  -N-C=N- coo- HO  Q  2 -OOC-CH3  S+  s  d  Q  S+  s  2  -OOC-C2Fs  d  -continued  -continued 