ALKALOIDS FROM ASPIDOSPERMA SPECIES FROM BOLIVIA

Two Bolivian Aspidosperma species were investigated. The seed and stem bark of Aspidosperma macrocarpon Mart. contain six known alkaloids: ( -)-vincadifformine, ervinceine, kopsanone, kopsinine, kopsanol in the seed, and kopsanone, kopsinine, kopsanol, 18-epikopsanol in the stem b ark. The stem bark of Aspidosperma pyrifolium Mart. contains eleven kn own alkaloids: (-)-vincadifformine, O-demethylpalosine, halocine, N-fo rmylaspidospermidine, vallesine, demethoxyaspidospermine, palosine, (- )-aspidospermine, aspidospermidine, akuammicine, tubotaiwine, beside t he two new bases dehydroxyhaplocidine and 10-methoxyaspidospermidine.