Camptothecin, a novel pyrrolo[3,4-b]-quinoline alkaloid, is a lead anticanc
er agent of the recent years. The compound and its several analogues (colle
ctively known as camptothecins) have been reported from different botanical
species. The former is also a promising drug in the AIDS chemotherapy. Sev
eral other camptothecins also exhibit significant antitumour and anti-HIV p
roperties. The literature concerning the chemistry and bioactivity of these
natural camptothecins has been briefly reviewed.