RECTOSIGMOIDITIS
\ɹˌɛktəsˌɪɡmɔ͡ɪdˈa͡ɪtɪs], \ɹˌɛktəsˌɪɡmɔɪdˈaɪtɪs], \ɹ_ˌɛ_k_t_ə_s_ˌɪ_ɡ_m_ɔɪ_d_ˈaɪ_t_ɪ_s]\
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Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.