The simplest and most important aromatic hydrocarbons are benzeneand its homologues such as toluene , xylene , ethylbenzene and the like. In aromatics, some aromatic rings are not completely benzene structures, but the carbon atoms in them are replaced by nitrogen , oxygen , sulfur and other elements. We call them heterocycles , such as five yuan like furan . The ring includes an oxygen atom and the pyrrole contains a nitrogen atom.Thiophene contains a sulfur atom and the like. Umthamo wansuku zonke ngu-30-45 mg. IGlaxo SmithKJine Avandia (GSK) itholakala kwifomu lethebhulethi eliqukethe i-4 ne-8 mg yento esebenzayo ye-rosiglitazone, kanye noma kabili ngosuku, ngokungakhathalelwa kokudla. Umthamo wansuku zonke we-8 mg. Kuhlelwa ukukhipha isidakamizwa esihlanganisiwe yinkampani efanayo - i-Avandamet (inhlanganisela ye-avandia ne-metformin). 4:13 And when he had arrived, Eli was sitting on a seat opposite the way, gazing out. For his heart was fearful on behalf of the ark of God. Then, after this man entered the city, he announced it to the city. And the entire city wailed.