The Collaborative International Dictionary of English v.0.48:

Oxalethyline \Ox`al*eth"yl*ine\, n. [Oxalic + ethyl + -ine.]
   A poisonous nitrogenous base (C6H10N2) obtained indirectly
   from oxamide as a thick transparent oil which has a strong
   narcotic odor, and a physiological action resembling that of
   atropine. It is probably related to pyridine.
   [1913 Webster]