prov:value
| - chloro, each R7 is a C1 -C4 alkyl, C1 -C4 alkoxy, hydroxy, chloro or fluoro, and d is an integer from 0 to 2; and (d) B' is selected from the groups represented by the following graphic formulae: ##STR13## wherein X is oxygen, Y is carbon or oxygen, R4 and R5 are each hydrogen or C1 -C4 alkyl, each R3 is a C1 -C4 alkyl, C1 -C4 alkoxy, hydroxy, or fluoro, and c is an integer from 0 to 2. 3.
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