prov:value
| - WG) selected from the group consisting of COOR11, COR12, C(O)OCOR11, CONR2, CN, NO2, NCS, NCO, SO2 R12, SO3 R11, SO2 NR2, CX3 2 ; R11 is hydrogen, alkyl, aryl, or aralkyl R12 is hydrogen, alkyl, aryl, or aralkyl, X2 can be the same or different and is a halogen atom.
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