parvoline

from The Century Dictionary.

• noun Tetramethylpyri-dine, C₅HN(CH₃)₄. Of the several isomeric varieties, the principal one is 2,3,4,5-tetra-methylpyridine, an oil which occurs in coal-tar. Other varieties are made by distilling bituminous shales, heating cinchonine with potash, or by the decay of horse-fiesh or mackerel. They are basic oils which form salts with acids.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A liquid base, C9H13N, of the pyridine group, found in coal tar; also, any one of the series of isomeric substances of which it is the type.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry A base of the pyridine group, found in coal tar.
• noun organic chemistry Any of the series of isometric substances of which parvoline is the type.