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NMR chemical shift reference compound
Any compound that produces a peak used as reference frequency in the delta chemical shift scale.
radical scavenger
A role played by a substance that can react readily with, and thereby eliminate, radicals.
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expectorant
Compounds that are considered to increase the volume of secretions in the respiratory tract, so facilitating their removal by ciliary action and coughing. Compare with mucolytics, which decrease the viscosity of mucus, facilitating its removal by ciliary action and expectoration, and antitussives, which suppress the cough reflex.
NMR chemical shift reference compound
Any compound that produces a peak used as reference frequency in the delta chemical shift scale.
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