prov:value
| - aining a carrier group of the following formula: ##STR2## whereinR.sup.1 denotes alkyl or aryl.R.sup.2 denotes alkyl, aryl or a group which together with R.sup.3 completes a condensed ring,R.sup.3 denotes hydrogen alkyl, aryl, hydroxyl, halogen such as chlorine or bromine, amino, alkylamino, dialkylamino including cyclic amino groups (such as piperidino and morpholino), acylamino, alkylthio, alkox
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