Fig. 8.
Structures of 8-acetyl-7-{3-[4-(2-bromophenyl)piperazin-1-yl]propoxy}-4-methylcoumarin (33) and 8-acetyl-7-{3-[4-(2-methoxyphenyl) piperazin-1-yl] propoxy}-4-methylcoumarin (34).
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