referring to the position of a functional group on a carbon atom
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2-Azetidinone, 3-fluoro-1,3,4-triphenyl-, cis-
(5E,3S)-1-phenylpent-3-en-1-ol
Phenylphosphinic acid
1-(4-fluorophenyl)but-3-en-1-amine
Phenyl-5-penten-3-yn-1