21 esters

Question 1

Prodrugs

Answer 1

converted to active forms by esterases

Question 2

Acetate/Butyrate

Answer 2

increased lipophilicity, prolonged action by IM

Question 3

Succinate

Answer 3

Soluble (due to charge), slow hydrolysis 30 45 minutes

Question 4

Phosphate

Answer 4

Soluble (due to charge), rapid hydrolysis (10 min) IV, IM injection for emergency