prov:value
| - Y1 can also be substituted or unsubstituted alkoxy (preferably of 1 to 10 carbon atoms, e.g. methoxy, ethoxy, 2-chloro-1-propoxy, etc.), substituted or unsubstituted carbamyloxy ##STR55## wherein R and R' are defined above, --O- M+ or --S- M+, wherein M+ is a monovalent cation, e.g. Na+, K+, Li+, NH4 +, etc.
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