| abstract |
Products of formula (I), wherein R1 is particularly phenyl or biphenyl optionally substituted by halogen, n1 and n2 are 0 or 1, R2 is particularly hydrogen or methyl substituted by phenyl, which may in turn be substituted, and A is particularly carboxy or alkyl substituted particularly by phenoxy, as well as all isomers and organic and inorganic base addition salts thereof, are disclosed. |