prov:value
| - the moieties mentioned;if r is not zero, R4 is lower alkyl, especially methyl or ethyl, lower alkoxy, especially methoxy, lower alkanoylamino, especially acetylamino, hydroxyphenylamino, especially p-hydroxyphenylamino, amino-lower alkyl-oxyphenyl-amino, especially 4-[(2-aminoethyl)-oxyphenyl]-amino, sulfamoylphenylamino, especially 4-sulfamoylphenylamino, carbamo-ylphenylamino, especially 4-carb
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