| 单词 | pyrrole ring |
| 释义 | > as lemmaspyrrole ring pyrrole ring n. an aromatic ring of four carbon atoms and one nitrogen atom. ΘΚΠ the world > matter > chemistry > organic chemistry > organic compounds > [noun] > heterocyclic compounds > containing nitrogen > pyrrole > pyrrole ring pyrrole nucleus1889 pyrrole ring1903 1903 Lancet 7 Mar. 656/2 Ehrlich believed that the methylene group of the reagent joined with the unknown body in the urine, which he believed contained a pyrrol ring. 1970 R. W. McGilvery Biochemistry xxi. 494 The basic unit of porphyrins is the pyrrole ring, with four of these linked to form the large porphyrin ring. 1989 New Scientist 18 Feb. 32/1 All porphyrins consist of four small circular molecules—each called pyrrole rings. These rings contain four carbon atoms and one nitrogen atom. < as lemmas |
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