Stereostructure of Subulacine-N-oxide: A New Pyrrolizidine Alkaloid from Heliotropium subulatum

Stereostructure of Subulacine-N-oxide: A New Pyrrolizidine Alkaloid from Heliotropium subulatum Pyrrolizidine N-oxide alkaloids of Heliotropium hirsutissimum Structural characterization of saturated pyrrolizidine alkaloids from Heliotropium transalpinum var. transalpinum Vell by NMR spectroscopy and theoretical calculations Structural characterization of saturated pyrrolizidine alkaloids from Heliotropium transalpinum var. transalpinum Vell by NMR spectroscopy and theoretical calculations Pyrrolizidine alkaloids from Heliotropium indicum Pyrrolizidine alkaloids of Heliotropium spathulatum Helibractinecine, a pyrrolizidine alkaloid from Heliotropium bracteatum Pyrrolizidine Alkaloids from Heliotropium rotundifolium Heliscabine, a pyrrolizidine ester alkaloid from Heliotropium scabrum Helifoline, a pyrrolizidine alkaloid from Heliotropium ovalifolium