Old parser didn't correctly handle, 'CCC[N+]1=c2c(=C(=O)NC1=O)[nH]cn2' (1676), and would match the SMARTS. New parser gives correct structure and no longer matches (verified by Depict Match).

Change-Id: I1d07009d463945bd6f848fe7aa32287ad6252a1d
Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>