5-membered


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Synonyms for 5-membered

of a chemical compound having a ring with five members

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References in periodicals archive ?
They differ in that the 5-membered thiazolidine ring of penicillin is replaced in the cephalosporins with a 6-membered dihydrothiazine ring.
2]= Double bonded 190 -CH= 111 >CH= 19 -CH=C< 285 >C=C< 222 Phenyl 735 Phenylene o,m,p 658 Napthenyl 1,146 Ring 5-membered 105-115 Ring 6-membered 95-105 Conjugation 20-30 H Variable 80-100 O Ethers 70 CO Ketones 275 COO Esters 310 CN 410 CI Mean 260 CI Single 270 CI Twin (>CC[I.
FA formation by isomerization of pyrene (MW 202) is unlikely in light of the high activation energy needed to form a 5-membered ring from a 6-membered ring, and in light of Scott and Roelofs' (29) report of FA equilibrium with two other 5-membered ring PAHs, acephenanthrylene and acenanthrylene, but not pyrene, in experimental studies of FA pyrolysis at 920, 1,000, and 1,115 [degrees] C.
Balsamo, Synthesis and biological evaluation of 5-membered spiro heterocycle-benzopyran derivatives against myocardial ischemia, Eur.
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