| 摘要 |
Products of formula: <IMAGE> in which R16 denotes a group protecting the amino radical, n' denotes an integer from 1 to 4 and Rar denotes a phenyl radical or a 5- or 6-membered aromatic heterocyclic radical containing from 1 to 4 heteroatoms chosen from sulphur, nitrogen and oxygen, the said phenyl and heterocyclic radicals being optionally substituted by one or more radicals chosen from the group consisting of amino, nitro, C1-4 alkyl or nitrile radicals, and process for their preparation.
|
