STUDIES ON PYRROLIZIDINE ALKALOIDS Ⅰ. THE ALKALOIDS OF SENECIO NEMORENSIS

Two crystalline alkaloids, one having the formula C₁₃H₂₁O₃N, m.p. 55—57℃ and the other C18H₂₇O₅N, m.p. 42—43℃, have been isolated from the herbs of Senecio nemorensis (Compositae) which was collected from Mountain Tien-Mu of Eastern China in July, 1961. The two isolated alkaloids were identified as macrophylline and sarracine by comparing the physical and chemical properties of their bases, salts, derivatives, as well as their hydrolysis products respectively.