CHALLENGER
\t͡ʃˈalɪnd͡ʒə], \tʃˈalɪndʒə], \tʃ_ˈa_l_ɪ_n_dʒ_ə]\
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Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.