prov:value
| - a) an optionally substituted monocyclic aryl in which one or more of the ring members is/are element(s) other than carbon, for example N, O or S, and preferred examples are monocyclic or bicyclic, eg benzimidazoyl, benzthiazoyl, furyl, imidazoyl, indolyl, indolizinyl, isoxazoyl, isoquinolyl, isothiazoyl, oxadiazoyl, pyranyl, pyrazinyl, pyridazinyl, pyrazoyl, pyridyl, pyrimidinyl, pyrrolyl, quinazo
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