Depending on the specific structure of (1R)-trans-chrysanthemic acid or its dibromo analogue, you may need to introduce or modify functional groups. For example, to create the dibromo analogue, you will need to introduce two bromine atoms selectively. This can be done through various bromination methods.
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(1S,3S)di(l)menthyl caronate
(R)-(-)-p-(2-methylhexyl)nitrobenzene
