| http://www.w3.org/ns/prov#value | - wherein for R5, R6, R7 and A the above-given meanings and preferences apply, and Z??? is, for example, an aliphatic, cycloaliphatic or heterocyclic moiety comprising a reactive group, for example a hydroxy group, an amino group or a protected amino group, in particular a group ???NRR??? or ???NR???C(O)O-tert.-butyl, wherein for R and R??? the above given meanings and preferences apply.
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