| http://www.w3.org/ns/prov#value | - compound of Formula 10; [0029] 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 10 with a protected amino acid, for example glutamic acid, to yield a compound of Formula 11; [0030] wherein each R1 and R4 is independent
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