The Collaborative International Dictionary of English v.0.48:

Hexine \Hex"ine\, n. [Gr. "e`x six.] (Chem.)
   A hydrocarbon, C6H10, of the acetylene series, obtained
   artificially as a colorless, volatile, pungent liquid; --
   called also hexoylene.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Diallyl \Di*al"lyl\, n. (Chem.)
   A volatile, pungent, liquid hydrocarbon, C6H10, consisting
   of two allyl radicals.
   [1913 Webster]