cnh2n2

from The Collaborative International Dictionary of English v.0.48

alkane \alkane\ n. (Chem.)
   a non-aromatic saturated acyclic hydrocarbon with the general
   formula {CnH(2n+2)}. A member of the {alkane series}.
   [WordNet 1.5]

from The Collaborative International Dictionary of English v.0.48

alkane series \alkane series\ n. (Chem.)
   a series of acyclic non-aromatic saturated hydrocarbons with
   the general formula {CnH(2n+2)}. They include methane,
   ethane, propane, butane, and the paraffins.

   Syn: methane series, alkane series, paraffin
        [WordNet 1.5 PC]