| http://www.w3.org/ns/prov#value | - Where a linker group between the triterpene and the agent is desired, the active ester of the triterpene glycoside may be prepared as described above and reacted with a linker group, for example, 2-aminoethanol, an alkylene diamine, an amino acid such as glycine, or a carboxy-protected amino acid such as glycine tert-butyl ester.
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