594537 Disclosed herein is the use of compounds comprising a phenylsulfamic acid moiety according to the depicted formula for preventing metastasis of cancer cells. The disclosed compounds can be used to prevent the spread of tumour or other types of cancer cells. Embodiments of the compounds include 4(S)-2-(5-(2-Methoxyphenyl)oxazol-2-ylamino)-2-(2-methylthiazol-4-yl)ethyl)phenylsulfamic acid, { 4-(S)-[2-Phenylmethanesulfonylamino-2-(2-ethylthiazol-4-yl)ethyl]phenyl]sulfamic acid and (S)-4-[2-Benzamido-2-(4-ethylthiazol-2-yl)ethyl]phenylsulfamic acid.