PEREMPTORY RULE
\pˈɛɹɪmptəɹˌi ɹˈuːl], \pˈɛɹɪmptəɹˌi ɹˈuːl], \p_ˈɛ_ɹ_ɪ_m_p_t_ə_ɹ_ˌi ɹ_ˈuː_l]\
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.