| 释义 |
lactam
lac·tam L5010650 (lăk′tăm)n. A cyclic amide, or any compound containing it, formed by the intramolecular condensation of an amino carboxylic acid.
[lact(one) + am(ide).]lactam (ˈlæktæm) n (Elements & Compounds) chem any of a group of inner amides, derived from amino acids, having the characteristic group -CONH-[C20: from lact(one) + am(ide)]lac•tam (ˈlæk tæm)
n. any of a group of cyclic amides characterized by the NHCO group. [1880–85; lact (one) + am (ide)] lactam
lactam[′lak‚tam] (organic chemistry) An internal (cyclic) amide formed by heating gamma (γ) and delta (δ) amino acids; thus γ-aminobutyric acid readily forms γ-butyrolactam (pyrrolidone); many lactams have physiological activity. lactam
lac·tam , lactim (lak'tam, lak'tim), Contractions of "lactoneamine" and "lactoneimine," and applied to the tautomeric forms -NH-CO- and -N=C(OH)-, respectively, observed in many purines, pyrimidines, and other substances; the latter form accounts for the acidic properties of uric acid.lac·tam , lactim (lak'tam, -tim) Contractions of "lactoneamine" and "lactoneimine," applied to the tautomeric forms -NH-CO- and -N=C(OH)-, respectively, observed in many purines, pyrimidines, and other substances. |