Variously substituted (phosphonoacetamido)oxy analogues of geranylgeranyl diphosphate (GGdP) as GGdP-transferase (GGTase) inhibitors and antiproliferative agents.

Aberrant signalling through the pathways of small GTP-binding proteins, belonging to the Ras superfamily (Ras, Rho, Rac, Cdc42 etc.), occurs in several types of cancer, where mutated Ras accumulates in its GTP-bound active form and causes uncontrolled cell proliferation. For these reasons, molecules able to target the Ras pathway in any of its stages are potentially useful in anti-cancer therapies.