Substituents that influence electron density in a molecule.
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2,5-diferrocenyl-1-(4-fluorophenyl)pyrrole
Benzoic acid, 4-[2-(1-hexynyl)-1,3-dithiolan-2-yl]-, methyl ester
5,7-diacetoxy-3-(3',4',5'-trimethoxyphenyl)-2H-1-chromen-2-one
