C13H10

from The Collaborative International Dictionary of English v.0.48

Fluorene \Flu`or*ene\, n. (Chem.)
   A colorless, crystalline hydrocarbon, {C13H10} having a
   beautiful violet fluorescence; whence its name. It occurs in
   the higher boiling products of coal tar, and is obtained
   artificially.
   [1913 Webster] fluoresceine

from The Collaborative International Dictionary of English v.0.48

Sequoiene \Se*quoi"ene\, n. (Chem.)
   A hydrocarbon ({C13H10}) obtained in white fluorescent
   crystals, in the distillation products of the needles of the
   California "big tree" ({Sequoia gigantea}).
   [1913 Webster]

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