prov:value
| - the group consisting of --CN, --OR5, ##STR69## or --CO2 R5 where R5 is a 1-20 carbon atom alkyl, aryl, cycloalkyl, alkenyl, or mixed alkyl-aryl group: R4 is a hydrocarbon radical having from 1 to 22 carbon atoms and is selected from the group consisting of alkyl, cycloalkyl, aryl, mixed alkyl-aryl and said hydrocarbon radicals having a substituent selected from the group consisting of --OH, --OR5,
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