The Collaborative International Dictionary of English v.0.48:

Olibene \Ol"i*bene\, n. (Chem.)
   A colorless mobile liquid of a pleasant aromatic odor
   obtained by the distillation of olibanum, or frankincense,
   and regarded as a terpene; -- called also conimene.
   [1913 Webster] Olid

The Collaborative International Dictionary of English v.0.48:

Conimene \Co"ni*mene\, n. [Etymol. uncertain.] (Chem.)
   Same as Olibene.
   [1913 Webster]