Covering: 2004. Previous review: Nat. Prod. Rep., 2004, 21, 785.

This review covers the isolation and structures of diterpenoids, including labdanes, clerodanes, pimaranes, abietanes, kauranes, cembranolides, taxanes and marine diterpenoids. The literature from January to December 2004 is reviewed, and 168 references are cited.