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Ring characteristics

AROMATIC NUCLEUS. Six-carbon ring characteristic of all benzene and related compounds. ATMOSPHERE. 14.69 psi or 760 mm of mercury. [Pg.142]

Like the penicillins, cephalosporins contain a P-lactam ring that is necessary for antimicrobial activity. However, a six-member dihydrothiazine ring replaces the five-member thiazoUdine ring characteristic of the penicillins. [Pg.183]

Another measure of the ring characteristics, called ring fusion density, denoted as RFA, is here defined as ]Authors, This Book] ... [Pg.656]

V—O—PO V ) P O ring, characteristic of both molecular and solid-phase structures of the V O RPO system. [Pg.551]

Meanwhile, Jones described a somewhat similar tandem radical sequence upon the substrate 162 as a facile entry to the tetracycle 163 possessing the ABCE-rings characteristic of ihc Aspidosperma and Strychnos alkaloids <01CC209>. [Pg.129]


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