The present invention relates to novel compounds. The present invention also relates to the compounds for use as a medicine, more in particular for the prevention or treatment of cancer, more in particular cancers expressing MCT1 and/or MCT4. The present invention also relates to a method for the prevention or treatment of cancer in animals or humans by using the novel compounds. The present invention furthermore relates to pharmaceutical compositions or combination preparations of the novel compounds and to the compositions or preparations for use as a medicine, more preferably for the prevention or treatment of cancer. The present invention also relates to processes for the preparation of the compounds.