Covering: July 2000 to June 2001. Previous review: Nat. Prod. Rep., 2001, 18, 520

This review covers the isolation, structure determination, synthesis and biological activity of indolizidine and quinolizidine alkaloids from microbial, plant and animal sources. Included in the review are slaframine; hydroxylated indolizidines and their analogues; alkaloids from ants and amphibians; metabolites of the genera Prosopis, Streptomyces and Nuphar and the Lythraceae; phenanthroindolizidines and related alkaloids; lupin alkaloids; and alkaloids from sponges, tunicates and coccinellid beetles. The literature from July 2000 to June 2001 is reviewed, and 172 references are cited.