| http://www.w3.org/ns/prov#value | - a first protecting group coupled to the amino terminus wherein said protecting group is a protecting group selected from the group consisting of a benzoyl group, an acetyl, a propionyl, a carbobenzoxy, a propyl, a butyl, a pentyl, a hexyl, and a 3 to 20 carbon alkyl; and a second protecting group coupled to the carboxyl terminus and said carboxyl terminal protecting group is an amide. 10.
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