prov:value
| - R1, R2, R3, R4, m and Z are as defined for formulae (I) and Q is a leaving group, e.g. Br, Cl, I, C1 -C4 alkanesulfonyloxy (e.g. methanesulfonyloxy), benzenesulfonyloxy, toluenesulfonyloxy (e.g. p-toluenesulfonyloxy) or trifluoromethanesulfonyloxy.
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