Abstract
The presence of protopine and γ-homochelidonine (=β-allocryptopine) as alkaloids of Bocconia frutescens has already been proved but the presence of α-allocryptopine, chelerythrine, and sanguinarine is only assumed. In order to elucidate this point, examinations were made on Brazilian Bocconia frutescens and α-allocryptopine, chelerythrine, and sanguinarine were isolated and identified, besides protopine. One other base of m.p. 268° was also isolated.
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