Abstract:
Ten alkaloids were isolated from the weak alkaloidal fraction of the title
Rauwolfia. On the basis of spectrometric analysis (uv, Jr, ms, nmr) six alkaloids Were identified as ajmalicine, reserpine, tetraphyllicine, ajmaline, antirhine(Ⅰ) and normacusine B respectively. Two alkaloids were identified to be yohimboid alkaloid but the configurations have not been clarified. The characterization of other alkaloids were hampered by scarcity of material. Antirhine (Ⅰ) was isolated from
Rauwolfia species for the first time.