Abstract

Biotransformation of the plant lignans, (+)-eudesmin and (+)-magnolin in Spodoptera litura larvae has been investigated. (+)-De-4′- O-methyleudesmin and (+)- de-4′-O- methyleudesmin-4′-O-β- d-glucoside were identified from the (+)-eudesmin-administered larvae faeces, and (+)-de-4″- O-methylmagnolin and (+)- de-4″-O- methylmagnolin-4″-O-β- d-glucoside were from (+)-magnolin-administered, respectively. The metabolic reaction of (+)-eudesmin and (+)-magnolin in Spodoptera litura larvae is de- O-methylation at para-position on veratryl and 3,4,5-trimethoxyl groups followed by glucosylation.

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