A repetitive glycan polysaccharide contained within a lipopolysaccharide (LPS). The <em>O</em>-antigen is attached to the core oligosaccharide, and comprises the outermost domain of the LPS molecule.

An aminotoluene in which the amino substituent is <em>ortho</em> to the methyl group.

Conjugate base of <em>O</em>-methylsalicylic acid.

A cresol that is phenol substituted by a methyl group at position 2. It is a minor urinary metabolite of toluene.

A xylene substituted by methyl groups at positions 1 and 2.

A dihydroxybenzoate that is the conjugate base of <em>o</em>-orsellinic acid.

A substituted aniline that is aniline in which the hydrogen <em>ortho</em> to the amino group has been replaced by a methoxy group. It is used as a chemical intermediate in the synthesis of azo pigments and dyes.

A dihydroxybenzoic acid that is 2,4-dihydroxybenzoic acid in which the hydrogen at position 6 is replaced by a methyl group.

<em>O</em>-organyl oximes R<small>₂</small>C=NOR' (R' ≠ H).

A methoxybenzoic acid that is the methyl ether of salicylic acid.

A <em>C</em>-nitro compound in which the nitro compound is <em>meta</em> to the amino group and <em>para</em> to the methyl group of <em>o</em>-toluidine.

A member of the class of imines that is benzophenone imine carrying two dimethylamino substituents at positions 4 and 4'. The hydrochloride salt is the biological stain 'auramine O'

A hydroxytoluene that is <em>o</em>-cresol carrying nitro substituents at positions 4 and 6.

An exposure to O-Desmethylangolensin.

An exposure to o-cresol.

An exposure to O-methyleugenol.

An exposure to o-toluidine.

An exposure to o-xylene.

An exposure to 2-O-acetyl-1-O-hexadecyl-sn-glycero-3-phosphocholine.

A lyase inhibitor which inhibits the action of a <em>C</em>‒<em>O</em> lyase (EC 4.2.*.*).

A lyase inhibitor which inhibits the action of a <em>P</em>‒<em>O</em> lyase (EC 4.6.*.*).

An EC 2.3.1.* (acyltransferase transferring other than amino-acyl group) inhibitor that interferes with the action of mitochondrial carnitine <em>O</em>-palmitoyltransferase (EC 2.3.1.21).

A class of carbonyl compound encompassing dicarboxylic acids and any derivatives obtained by substitution of either one or both of the carboxy hydrogens.

An exposure to O-methyleugenol via inhalation route.

An exposure to auramine O free base.

An exposure to 4,6-dinitro-o-cresol.

An exposure to 5-nitro-o-toluidine.

An exposure to EC 2.3.1.21 (carnitine O-palmitoyltransferase) inhibitor.

An EC 3.5.1.* (non-peptide linear amide C-N hydrolase) inhibitor that interferes with the action of UDP-3-<em>O</em>-acyl-<em>N</em>-acetylglucosamine deacetylase (EC 3.5.1.108).

An EC 2.1.1.* (methyltransferases) inhibitor that interferes with the action of 3'-hydroxy-<em>N</em>-methyl-(<i>S</i>)-coclaurine 4'-<em>O</em>-methyltransferase (EC 2.1.1.116).

An EC 1.13.* [oxidoreductase acting on single donors with incorporation of molecular oxygen (oxygenases)] inhibitor that inhibits the action of any oxidoreductase incorporating 2 atoms of oxygen (EC 1.13.11.*).

An exposure to EC 2.1.1.116 [3'-hydroxy-N-methyl-(S)-coclaurine 4'-O-methyltransferase] inhibitor.

An exposure to o-anisidine.