COLUMBIAN

\kəlˈʌmbi͡ən], \kəlˈʌmbi‍ən], \k_ə_l_ˈʌ_m_b_iə_n]\
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1899 - The american dictionary of the english language.
By Daniel Lyons

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Quinones

  • Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.
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