translate English to French: The mode of incorporation into lupinine of cadaverine, intramolecularly doubly labelled with,15N and with,13C at the C-atom adjacent to 15N, i.e., 13C, 15N-"bond-labelled", was determined by,13C nmr spectroscopy; lupinine is generated from two cadaverine-derived C5-units by a route which excludes a "dimeric" intermediate with C2v symmetry.
Faisant appel à la spectroscopic rmn du, 13C et utilisant de la cadavérine doublement marquée d'une façon intramoléculaire par du 15N et du 13C sur le carbone voisin du,15N (liaison 13C, 15N marquée), on a étudié le mode d'incorporation de la cadavérine à la lupinine.