PREEXISTENTISM
\pɹˈiːksɪstəntˌɪzəm], \pɹˈiːksɪstəntˌɪzəm], \p_ɹ_ˈiː_k_s_ɪ_s_t_ə_n_t_ˌɪ_z_ə_m]\
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.