and structure determination of the two new esteralkaloids of Heliotropiumbracteatum, viz. helibracteatinine and helibracteatine, are described. Helibracteatinine was formulated as 1β-hydroxymethyl-7α-angelyloxy-8α-pyrrolizidine-1α-ol and helibracteatine as 1β-angelyloxy-8α-pyrrolizidine-1α,7α-diol. Structures were established by spectrometry of the alkaloids and by hydrolysis to their necine bases.