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locant

Pronunciation: lo'kant

Definition: A number or letter preceding a substituent name in the name of a complex chemical that specifies the position (location) of the substituent on the parent molecule, 5 in 5-methyluridine, S in S-adenosylmethionine.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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