CONCLUSIONS
Due to their peculiar stereochemistry and numerous biological activities, lignans are of widespread interest. As only a few biosynthetic steps have been clarified to date, we aimed to further resolve the molecular basis of lignan biosynthesis. To this end, we first established that the
The arylbutyrolactone lignans (-)-hinokinin, 3,4 : 3',4'-bis(methylenedioxy)-lign-7( E)-en-9,9'-olide and 3,4 : 3',4'-bis(methylenedioxy)-lign-7( Z)-en-9,9'-olide, hitherto unknown for the genus LINUM, were isolated by HPLC from callus cultures of LINUM CORYMBULOSUM (Linaceae) and identified by