Source : Webster's Revised Unabridged Dictionary (1913)

Sinapoline \Si*nap"o*line\, n. [Sinapis + L. oleum oil.] (Chem.)
   A nitrogenous base, {CO.(NH.C3H5)2}, related to urea,
   extracted from mustard oil, and also produced artifically, as
   a white crystalline substance; -- called also {diallyl urea}.