Bromoform;Acetyl bromide;Propionyl bromide;Bromoacetyl bromide;2-bromopropionyl bromide;N-butyl bromide;1-bromopropane;1-bromo hexane;1-bromo heptane;1-bromo octane;1-bromo decane;1-bromo dodecane;4-bromo benzyl bromide;6-Bromoveratraldehyde;(E)-1,4-dibromobut-2-ene;Phosphorus tribromide and etc;Isopropyl chloroformate；Heptanoyl chloride；Dodecanoyl chloride and etc .Amino acids：L-Hydroxyproline；L-ARGININE；L-Proline and etc .velpatasvir intermediate；Sofosbuvir intermediate；Ledipasvir