Incorporation of chirally deuterated putrescines into pyrrolizidine alkaloids: a reinvestigation

alcaloides alkaloids asteraceae biosynthese biosynthesis compositae culture techniques enfouissement enterrado espectrometria espermidina incorporation metabolism metabolisme metabolismo poliaminas polyamine polyamines putrescina putrescine pyrrolizidine alkaloids senecio senecio vulgaris spectrometrie spectrometry spermidine technique de culture