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why sialic acid called as it contains nine carbon backbone but really its having 11 carbon — Preceding unsigned comment added by 14.139.57.98 (talk) 06:16, 18 July 2014 (UTC)
The structure is incorrect, the carboxylate should be equatorial.[1] Cyclohex-Anon (talk) 08:29, 20 August 2023 (UTC)