SEARCH Articles Figures Tables Asymmetric synthesis of pyrrolizidine alkaloids Pyrrolizidin Pyrrolizidine Pyrrolizidine alkaloids chiral synthesis Pyrrolizidine alkaloids total synthesis Pyrrolizidine alkaloids, synthesis Pyrrolizidine bases synthesis Pyrrolizidine synthesis Pyrrolizidine synthesis Synthesis of pyrrolizidines The Synthesis of Pyrrolizidine Derivatives