GOB Chemistry
(i) tertiary; (ii) tertiary; (iii) secondary; (iv) primary
(i) heterocyclic aromatic; (ii) quaternary; (iii) secondary; (iv) tertiary
(i) tertiary; (ii) secondary; (iii) secondary; (iv) secondary
(i) heterocyclic aromatic; (ii) tertiary; (iii) secondary; (iv) primary