Natural Product Reports is a bimonthly journal of critical reviews. It aims to stimulate progress in the study of natural products bioorganic chemistry and chemical biology by providing regular and comprehensive reviews of the relevant literature published during well-defined periods. Topics include the isolation, structure, biosynthesis, biological activity, and chemistry of the major groups of natural products - alkaloids, terpenoids and steroids, aliphatic, aromatic and O-heterocyclic compounds, and other metabolites of marine, plant and microbial origins. This coverage is augmented by frequent reviews of the wider context of bioorganic chemistry, including developments in enzymology, nucleic acids, genetics, chemical ecology, primary and secondary metabolism, and isolation and analytical techniques, which will be of general interest to all workers in the area. Occasional articles by eminent scientists provide an important historical perspective describing major developments from the personal viewpoint of those involved.