Refers to a molecule with bulky substituents that may slow down or hinder a chemical reaction.
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2-(1-benzyl-2-phenyl-ethoxysulfonyl)-benzoic acid 2-(2-methoxy-ethoxy)-ethyl ester
(2Z,4Z)-5-(4-Hydroxy-2,6,6-trimethyl-cyclohex-1-enyl)-3-methyl-penta-2,4-dienal
17α-butyl-17β-hydroxy-3-methoxy-estra-1,3,5(10)-triene
