prov:value
| - A is optionally substituted on carbon by one or more D and is selected from C1-4alkyl, phenyl, a heterocyclic group or phenylC1-4alkyl; E is a direct bond or ???O???, ???C(O)???, ???N(Ra)C(O)???, ???S(O)r??? or ???N(Ra)SO2???; wherein Ra is hydrogen, methyl or ethyl and r is 0-2; D is oxo, cyano, hydroxy, amino, carboxy, carbamoyl, sulphamoyl, C1-3alkyl, C2-3alkenyl, C2-3alkynyl, C1-3alkoxy, C1-3a
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