New aporphine alkaloids from Guatteria foliosa
Rojas de Arias, A
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Abstract. Four new, alkaloids were obtained from Guatteria foliosa, namely, the noraporphines (--)-3-methoxyputerine  and (+)-norguattevaline , the more highly oxidized (+)-3-methoxyguattescidine , and the oxoaporphine 3-methoxyoxoputerine . Among several other known alkaloids also found in this same plant, (--)-3-hydroxynornuciferine, (--)-isoguattouregidine, and argentinine exhibited significant activity against Trypanosoma cruzi.