om, E is a CH group or a nitrogen atom, G is an oxygen atom, a sulfur atom, a nitrogen atom or an NH...http://www.google.com/patents/US6407121?utm_source=gb-gplus-sharePatent US6407121 - Dopamine d4 receptor antagonists; psychological and brain disorders; alzheimer*s disease, schizophrenia; side effect reductionAdvanced Patent SearchPublication numberUS6407121 B1Publication typeGrantApplication nu