| http://www.w3.org/ns/prov#value | - wherein R1 is a protecting group, R12 is a straight or branched chain alkyl, substituted alkyl, aryl, or substituted aryl, and each ???n??? is independently an integer from 0 to about 200; coupling the deprotected amine of Formula X with a protected amino acid, for example glutamic acid, to yield a compound of Formula XI;
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