primary structure 

https://doi.org/10.1351/goldbook.P04843
In the context of @M03667@ such as @P04898@, constitutional formula, usually abbreviated to a statement of the @ST06775@ and if appropriate cross-linking of chains.
See also: secondary structure, tertiary structure, quaternary structure
Source:
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2213 [Terms] [Paper]
See also:
White Book, 2nd ed., p. 80 [Terms] [Book]
Citation: 'primary structure' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.P04843 RIS BibTex EndNote
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Last revised: February 24, 2014