HISTORY LESSON
\hˈɪstəɹˌi lˈɛsən], \hˈɪstəɹˌi lˈɛsən], \h_ˈɪ_s_t_ə_ɹ_ˌi l_ˈɛ_s_ə_n]\
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.