| http://www.w3.org/ns/prov#value | - (23) a library of compound of the formula (I): wherein R1 is a group represented by the formula: ???Y1???Y2???Y3???Ra wherein Y1 and Y3 are single bond; Y2 is ???NRb???C(???O)???; Ra is optionally substituted carbocyclic group; Rb is hydrogen;
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