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Use "unsubstituted" in a sentence
"In the unsubstituted compounds, and particularly in cobyric acid, the deviations are in the same sense as in the nickel corrin derivative and as in this molecule, C-5 and C-15, which carry C-35 and"
"Gwynplaine to his (unsubstituted) rank in the English peerage, when he himself is anticipating similar treatment."
"Synlhesis of Polypeptides The early literature on the direct polymerization of unsubstituted amino acids has been previously reviewed in some detail."