collidinen.

1855 C. G. Williams in Chem. Gaz. 308 Collidine is one of the bases discovered by Dr. Anderson in Dippel's oil, and found a few weeks subsequently by me in shale naphtha.

1863–72 H. Watts Dict. Chem. I. 1082 Collidine C₈H₁₁N, an alkaloid found among the products of the dry distillation of animal substances and of coal..Collidine is a colourless, oily liquid, having a strongly aromatic, not unpleasant odour.

1884 Manch. Examiner 29 Dec. 6/5 Tobacco smoke..contains a second toxical principle called colidine.