English: Structure of pyrrolizidine alkaloid Phalaenopsin La, as indicated in BRANDÄNGE, SVANTE; LÜNING, BJÖRN. Studies on Orchidaceae alkaloids. XII. Pyrrolizidine alkaloids, 1969.,
FURUYA, Tsutomu; HIKICHI, Manabu. Chemistry of Pyrrolizidine Alkaloids. Journal of Synthetic Organic Chemistry, Japan, 1977, 35. Jg., Nr. 8, S. 653-668., and
BRANDÄNGE, SVANTE, et al. Studies on orchidaceae alkaloids. XXX. Investigation of fourteen Phalaenopsis species. A new pyrrolizidine alkaloid from Phalaenopsis equestris Rchb f. Acta Chem Scand, 1972, 26. Jg., Nr. 6, S. 2558-2560.
Deutsch: Struktur des Pyrrolizidinalkaloids Phalaenopsin La nachgezeichnet aus den Studien BRANDÄNGE, SVANTE; LÜNING, BJÖRN. Studies on Orchidaceae alkaloids. XII. Pyrrolizidine alkaloids, 1969.,
FURUYA, Tsutomu; HIKICHI, Manabu. Chemistry of Pyrrolizidine Alkaloids. Journal of Synthetic Organic Chemistry, Japan, 1977, 35. Jg., Nr. 8, S. 653-668., und
BRANDÄNGE, SVANTE, et al. Studies on orchidaceae alkaloids. XXX. Investigation of fourteen Phalaenopsis species. A new pyrrolizidine alkaloid from Phalaenopsis equestris Rchb f. Acta Chem Scand, 1972, 26. Jg., Nr. 6, S. 2558-2560.