| http://www.w3.org/ns/prov#value | - Intermediates of formula (III-a) wherein A represents ???CH2???CH2???, said intermediates being represented by formula (III-a-1), can be prepared by reacting an intermediate of formula (XII-a) with Pd/C in the presence of a suitable solvent, such as for example an alcohol, e.g. ethanol and the like.
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