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...ixtures of [[phenols]], [[polycyclic aromatic hydrocarbon]]s (PAHs), and [[heterocyclic compound]]s. It is a mixture of about 200 substances. <ref name="c">[http:/ ...n 5 percent of crude coal tar are [[List of IARC Group 1 carcinogens|Group 1]] [[carcinogen]].

...romide, 2,7-Diamino-10-ethyl-9-phenylphenanthridinium bromide, 3,8-Diamino-1-ethyl-6-phenylphenantridinium bromide, 5-Ethyl-6-phenyl-phenanthridine-3,8- | NFPA-F = 0 <!-- 1 ? (old) -->

| SMILES = C=1NCCN=1 ...a C₃H₆N₂, derived from [[imidazole]]. The ring contains an [[imine]] bond, and the carbons at the 4 and 5 positions are si

| InChI = 1/C2H4O/c1-2-3-1/h1-2H2 | MolarMass = 44.05 g mol⁻¹

| OtherNames = Benzol<br />cyclohexa-1,3,5-triene | InChI = 1/C6H6/c1-2-4-6-5-3-1/h1-6H

...as two associating units and fasten to the central atom so as to produce [[heterocyclic]] rings."<br />{{cite journal | journal = [[J. Chem. Soc., Trans.]] | year :Cu²⁺ + en {{eqm}} [Cu(en)]²⁺ (1)

...identate]] [[ligand]]. It is also a building block for the synthesis of [[heterocyclic compound]]s. {| class="wikitable" style="float: right;" border="1"

...d [[blood cell]]s. Heme is a cofactor of the protein hemoglobin. They are heterocyclic [[macrocycle]]s composed of four modified [[pyrrole]] subunits interconnect ...LA combine to give [[porphobilinogen]] (PBG), which contains a [[pyrrole]] ring. Four PBGs are then combined through [[deamination]] into [[hydroxymethyl b

| subunit1 = Hb-α1 | isbn = 0-13-981176-1}}</ref> and the tissues of some [[invertebrate]]s. Hemoglobin in the [[bloo

The need for additional nomenclature for organometallic compounds became apparent in the mid-1950s when Dunitz, [[Leslie Orgel|Orgel]], and R === Historically important compounds where the ligands are described with hapticity ===

...g from [[isoquinoline|7-hydroxyisoquinoline]]. Although the title of their 1 page publication is ''The total synthesis of quinine'' it is oddly not the ...synthesis. <ref>''SYNTHESIS OF γ-LACTONES BY THE CONDENSATION OF 2-ALKENE-1,4-DIOLS WITH ORTHOCARBOXYLIC ESTERS'' Kiyosi Kondo and Fumio Mori Chemistry