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acetoacetic

ˌacetoaˈcetic, a.
  [f. aceto- + acetic a.]
  acetoacetic acid, an unstable acid, present in traces in urine and in increased amount in the urine of diabetic patients; prepared from acetoacetic ester: a colourless liquid ester, ethyl acetoacetate.

1903 Walker & Mott tr. Holleman's Org. Chem. I. 291 Acetoacetic acid..is not of much importance, but its ethyl ester, acetoacetic ester, is a very interesting compound. 1956 Nature 24 Mar. 545/1 The formation of large amounts of acetoacetic acid CH3{b1}CO{b1}CH2{b1}COOH. 1957 Technology Aug. 226/2 Another [chapter] on..synthetic reagents includes..acetoacetic and malonic esters.

Oxford English Dictionary

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