theobromine

from The Collaborative International Dictionary of English v.0.48

Theobromine \The`o*bro"mine\, n. (Chem.)
   An alkaloidal ureide, {C7H8N4O2}, homologous with and
   resembling caffeine, produced artificially, and also
   extracted from cacao and chocolate (from {Theobroma Cacao})
   as a bitter white crystalline substance; -- called also
   {dimethyl xanthine}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

cacaine \ca*ca"ine\, n. (Chem.)
   The essential principle of cacao; -- now called
   {theobromine}.
   [1913 Webster]