Sentence examples for polycyclic ring from inspiring English sources

Compound 118 (Fig. 7) was a novel meroterpenoid possessing respective 4/5/6/6/6 polycyclic ring systems [46].

Structure activity relationships of two different regions of the chemotype (polycyclic ring and substituents on quaternary carbon) are discussed.

Sulfonamides/carboxylates incorporating polycyclic ring systems such as benzothiopyranopyrimidine, pyridothiopyranopyrimidine or dihydrobenzothiopyrano[4,3-c]pyrazole may be considered as interesting candidates for exploring the design of isoform-selective CAIs with various pharmacologic applications.

Polycyclic ring structures are useful as starting scaffolds in medicinal chemistry programs to develop multi-functional drugs, and may also be useful moieties added to existing structures to improve the pharmacokinetic properties of drugs currently used in the clinic or under development.

As shown in Figure 2, the Black sample was dominated by Actinomycetales such as Brevibacterium and Corynebacterium that volatilize sulfur via an organic intermediate and can also break down complex heterocyclic and polycyclic ring structures[ 17, 18].

Products containing the 1,3-dicarbonyl component within various polycyclic ring systems were also prepared (4 p– 4 r and 4 v), although the enantioselectivities of 4 p and 4 q were more modest.

The new derivatives were designed by replacing the benzene ring of the prototype 1 with both aromatic and aliphatic, monocyclic and polycyclic rings (compounds 3a i), or by inserting a number of substituents on the methylene linker of 1 (compounds 4a l).

Some of the intramolecular NOEs between protons of the polycyclic aromatic ring system are shown in Figure 3A (connectivities a m).

In each adduct, one face of the polycyclic aromatic ring system is exposed to the solvent while the other side is in van der Waals contact with the groove walls.

The energetic considerations that come into play in determining whether a polycyclic aromatic ring system resides in a groove or is intercalated are multifaceted in nature: intercalation is favored by withdrawal of the aromatic rings from the aqueous solvent and stacking interactions with the DNA bases.

With the exception of the H4 and H5 protons of DB[ a, l]P, these upfield shifts are similar to those observed in the case of the polycyclic aromatic ring protons of the 10 S-B[ a]P-dG 11/10-mer 11/10-merdeletionhat are uniformly upfielduplexthat