prov:value
| - R1, R2 and R3 are individually H, C1-3 haloalkyl, F, Br, Cl, I, C1-3 alkyloxy, R1 and R2 or R2 and R3 taken together represent methylmedioxy, provided at least one of R1, R2 and R3 is H, one of R1, R2 and R3 is other than H and only one of R1, R2 and R3 can be I;
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