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Heterocyclic Compounds, 4 or More Rings

Known as: 4-ring or more heterocyclic compounds, Heterocyclic Compounds with Four or More Rings, Heterocyclic Cpds, 4 or More Rings 
A class of heterocyclic compounds that include four or more fused rings. Both aromatic or non-aromatic ring structures are included in this category.
National Institutes of Health

Related topics

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50 relations

Narrower (49)

1,3,5-trioxazatriquinane10-hydroxycoronaridine19,20-dihydroakuammicine5-O-desgalloylepipunicacortein A
antagonists & inhibitors

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
2012
2012
How Do Annuloplasty Rings Affect Mitral Annular Strains in the Normal Beating Ovine Heart?
Background— We hypothesized that annuloplasty ring implantation alters mitral annular strains in a normal beating ovine heart… 
Highly Cited
2010
Highly Cited
2010
The dynamic chemistry of molecular borromean rings and Solomon knots.
The dynamic solution equilibria between molecular Borromean rings (BRs) and Solomon knots (SKs), assembled from transition metal… 
2005
2005
Annular Height-to-Commissural Width Ratio of Annulolasty Rings In Vivo
Background—A “saddle-shaped” mitral annulus with an optimal ratio between annular height and commissural diameter may reduce… 
2002
2002
The effects of mitral annuloplasty rings on mitral valve complex 3-D geometry during acute left ventricular ischemia.
Review
2002
Review
2002
U.S. trends in refractive surgery: 2001 International Society of Refractive Surgery Survey.
PURPOSE To determine the trends in refractive surgery in the United States in 2001. METHODS The 980 U.S. members of the… 
1998
1998
Liesegang Rings and Endometriosis
SummaryLiesegang rings (LRs) are acellular. ringlike structures that may form within and around inflamed or necrotic tissue. LRs… 
Highly Cited
1987
Highly Cited
1987
Liesegang Rings in Tissue: How to Distinguish Liesegang Rings from the Giant Kidney Worm, Dioctophyma renale
Liesegang rings (LRs) are periodic precipitation zones from supersaturated solutions in colloidal systems. They are formed by a… 
Highly Cited
1976
Highly Cited
1976
In-plane vibrations of annular rings
1965
1965
A COUNTEREXAMPLE IN NOETHERIAN RINGS.
1965
1965
AN EXAMPLE IN NOETHERIAN RINGS.
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