| http://www.w3.org/ns/prov#value | - A is selected from C4-8cycloalkylcarbonyl, 1-naphthylsulfonyl, 2-naphthylsulfonyl, and substituted naphthylsulfonyls (where the substituents are selected from C1-4alkyl, perfluoroC1-4alkyl, C1-4alkoxy, hydroxy, halo, amido, nitro, amino, C1-4alkylamino, C1-4dialkylamino, carboxy and C1-4alkoxycarbonyl); an L amino acid such as glycine or proline, where the amino terminus is unsubstituted or monosu
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