Article révisé par les pairs
Résumé : The structures of (+)-4-hydroxysedamine 1 and (+)-4-H-hydroxyallosedamine 2, two new minor alkaloids from Sedum itacre, are reported 1 and 2 were synthesized, and their absolute configuration established, via the optically pure tetrahydro 1,3-oxazines 17 and 18. © 1985.