The invention emcompasses polyunsaturated fatty acid monoglycerides and derivatives thereof, having the formulae (I), (II), (III) and (IV), pharmaceutically acceptable salts thereof, compositions thereof and processes of preparing said compounds. These compounds can be useful as cancer chemopreventive agents, cancer treating agents, or radioenhencers for radiotherapy of cancer, or for inhibiting tumor growth or cell proliferation, or reducing tumor growth.
