prov:value
| - each of X and X??? is a member independently selected from the group consisting of NO2, SO2R1, SOR1, SR1, SONH2, SO2NH2, SONHR1, SO2NHR1, COR1, OR1, R1, CN, halogen, hydrogen, phenyl, and phenyl substituted by halogen, NO2, R1, OR1, PO2R1, CONHR1, NHR1, NR1R2, CONR1R2 or OCOR1, wherein each of R1 and R2 is a member independently selected from the group consisting of methyl, ethyl, n-propyl, isopro
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