Nor-

The acronym standards was used in the chemical nomenclature of organic compounds for the identification of several different structural elements.

This type of chemical name mapping is to be regarded today as a semi- systematic, it is no longer supported by the current conventions of the systematic designation by the IUPAC. However, many are still historically assigned names with standards in use.

Different meanings of the abbreviation standards were attributed, as " normal connection", but also N atom without radical or English no- radical.

Use

Adrenaline

L- norleucine

L- leucine

Generally it was used to indicate a structural relationship to a related chemical compound. The difference between both structures was regularly that the normal connection via a methylene group, a methylene unit or a methine group has less than the reference compound. So it shows a lack of methyl radicals, shorter side chains or rings with less ring members.

Natural Products

In natural materials so the (partial multiple ) demethylation was compared to an ordinary connection clarified. Examples of this include norepinephrine also norbixin norcarane, norephedrine, nornicotine, and 19 - nortestosterone Norpinan.

Amino acids

Norleucine and norvaline are the unbranched isomers of the other branched chain amino acids leucine and valine. The prefix nor - stands for normal or n- amino acid and does not go here with a reduction in the number of carbon atoms associated.

Related acronyms

In the absence of two or more carbon atoms, the designations have been Binor, trinor ( also outdated bisnor, Trisnor ) etc. occasionally. The lack of longer carbon chains was Apo- indicated by the prefix.

Chain extensions or ring expansions were identified by homopolymer.