Pyrrolizidine Alkaloids from Amphorogyne spicata

Pyrrolizidine Alkaloids from Amphorogyne spicata Pyrrolizidine Alkaloids from <i>Amphorogyne spicata</i> First total synthesis of a new pyrrolizidine alkaloid, amphorogynine A Two new pyrrolidine alkaloids from the red alga Acanthophora spicifera Pyrrolizidine alkaloids of Heliotropium spathulatum Acanthophoraine A, a new pyrrolidine alkaloid from the red alga Acanthophora spicifera Dichloroketene−Chiral Olefin-Based Approach to Pyrrolizidines:  Highly Stereocontrolled Synthesis of (+)-Amphorogynine A Pyrrolizidine alkaloids from Neatostema apulum Cyclopeptide alkaloids from Zizyphus spina-christi Ambiguanine A–G, hexahydrobenzophenanthridine alkaloids from Corydalis ambigua var. amurensis