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| - ???Heteroaromatic moiety:??? refers to an aromatic moiety wherein one or more of the ring carbon atoms is replaced with another atom such as N, O or S. Typical heteroaromatic moieties include, but are not limited to, pyran, pyrazole, pyridine, pyrrolke, pyrazine, pyridazine, pyrimidine, pyrrolizine, quinazoline, quinoline, quinolizine, quinoxaline, selenophene, thiophere, tellurophene, xanthene an
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