ENDOGEN
\ˈɛndə͡ʊd͡ʒən], \ˈɛndəʊdʒən], \ˈɛ_n_d_əʊ_dʒ_ə_n]\
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Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.