Intermediates of ramipril

a , n-acethyl-3-chloro-l-serine methyl ester

b , (s,s)-2-azabicyclo[3,3,0]-octane-3-carboxylic acid benzylester hydrochloride

(cas no.93779-29-4)

c , (s,s,s)-2-azabicyclo[3,3,0]-octane-3-carboxylic acid benzylester hydrochloride

(cas no.93779-31-8)