Erysotrine-N-oxide and erythrartine-N-oxide, two novel alkaloids from Erythrina mulungu

Abstract
Erysotrine, erythrartine, hypaphorine and 2 novel alkaloids, erysotrine-N-oxide and erythrartine-N-oxide, were isolated from the flowers of the medicinal plant E. mulungu. The N-oxide structures were determined by spectroscopic analysis (mass, 1H and 13C NMR) and by partial synthesis.