| http://www.w3.org/ns/prov#value | - Y is a phenyl or naphthyl group, or heteroaryl selected from a group consisting of pyridyl, thienyl, furyl, pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, oxazolyl, irnidazolyl and pyrrazolyl, said phenyl and heteroaryl groups being optionally substituted with one or two R2 groups, or
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