Bupleurum salicifolium

Another interesting example of phenylpropanoid coupling was reported from Bupleurum salicifolium (44). In this regard, an H2O2-dependent peroxidase was isolated, which converts either caffeic 8 or ferulic 9 acids, into 8.8 -bis (caffeic acid) and 8.8 -bis (ferulic acid), respectively. Although a role was proposed for these compounds in the synthesis of more elaborate arylnaphthalene lignan skeleta, this has not been established. 

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