<Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <P> In organic chemistry, acetyl is a moiety, the acyl with chemical formula CH CO . It is sometimes represented by the symbol Ac (not to be confused with the element actinium). The acetyl group contains a methyl group single - bonded to a carbonyl . The carbonyl center of an acyl radical has one nonbonded electron with which it forms a chemical bond to the remainder R of the molecule . In IUPAC nomenclature, acetyl is called ethanoyl, although this term is rarely heard . The acetyl moiety is a component of many organic compounds, including acetic acid, the neurotransmitter acetylcholine, acetyl - CoA, acetylcysteine, and the analgesics acetaminophen (also known as paracetamol) and acetylsalicylic acid (better known as aspirin). </P> <P> The introduction of an acetyl group into a molecule is called acetylation . In biological organisms, acetyl groups are commonly transferred from acetyl - CoA to coenzyme A (CoA). Acetyl - CoA is an intermediate both in the biological synthesis and in the breakdown of many organic molecules . Acetyl - CoA is also created during the second stage of cellular respiration, the Krebs Cycle, by the action of pyruvate dehydrogenase on pyruvic acid . </P>

What is the difference between acyl and acetyl group
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