pyrroline

from The Century Dictionary.

• noun A liquid base, , made by reducing pyrrol with zinc-dust and acetic acid. It boils at 90–91° C. Also called dihydropyrrol.

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

• noun (Chem.) A nitrogenous base, C4H7N, obtained as a colorless liquid by the reduction of pyrrole.

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

• noun organic chemistry Any of three isomeric monounsaturated heterocycles having a five-membered ring and one nitrogen atom C4H7N; any derivative of these compounds