The Collaborative International Dictionary of English v.0.48:

Iridoline \I*rid"o*line\, n. [Iridescent + L. oleum oil.]
   (Chem.)
   A nitrogenous base C10H9N, extracted from coal-tar naphtha,
   as an oily liquid. It is a member of the quinoline series,
   and is probably identical with lepidine. Iridosmine

The Collaborative International Dictionary of English v.0.48:

Lepidine \Lep"i*dine\ (l[e^]p"[i^]*d[i^]n or *d[=e]n), n.
   (Chem.)
   An organic base, C9H6.N.CH3, metameric with quinaldine, and
   obtained by the distillation of cinchonine.
   [1913 Webster]