+Ac2 often denotes a [chemical compound](/wiki/Chemical_Compound) where "Ac" represents an [acetyl](/wiki/Acetyl) group. This notation frequently appears in organic chemistry to simplify naming or depict a specific molecular structure.
+## See also
+- [Organic Chemistry](/wiki/Organic_Chemistry)
+- [Reagent](/wiki/Reagent)
+- [Molecular Formula](/wiki/Molecular_Formula)
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