A substituent that decreases electron density, potentially accelerating or inhibiting certain reaction steps.
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butane 1,4-di-(4-hydroxy)cinnamate
2-p-tolyl-2-(trifluoromethyl)-2H-pyran-4(3H)-one
4-(3-bromo-2-{2-[(2R)-2-methylpyrrolidin-1-yl]ethyl}-1-benzofuran-5-yl)benzonitrile
Silane, [[4-bromo-5-[(1E)-2-[4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]phenyl]ethen yl]-1,3-phenylene]bis(oxy)]bis[(1,1-dimethylethyl)dimethyl-
Piperazine, 1-[4-[(4-nitrophenyl)azo]phenyl]-
3-endo-(p-Toluenesulfonyl)bicyclo<2.2.2>-oct-5-ene-2-exo-carbaldehyde
2,6-diisopropyl-4-(biphenylmethyl)phenol
1-[(5-nitrofuran-2-yl)methylidene]-2-phenylhydrazine
Benzene, 1-[bis(phenylthio)methyl]-2-chloro-4-nitro-
Silane, (1,1-dimethylethyl)dimethyl[[(2E)-1-methylene-3-(3,4,5-trimethoxyphenyl )-2-propenyl]oxy]-
