The present invention relates to novel compounds of formula (IC) or a salt thereof: wherein: p is an integer ranging from 0 to 4; R1 is independently selected from a group consisting of: halogen, hydroxy, cyano, C1-4alkyl, haloC1-4alkyl, C1-4alkoxy, haloC1-4alkoxy, C1-4alkanoyl or SF5; or corresponds to a group R5; m1, m2, m3, and m4 are 0; m5, m6 and m7 are each independently 0, 1 or 2 wherein the sum of m5, m6 and m7 is 1 or 2; R6 is C1-6alkyl; R7 is halogen, C1-6alkyl or haloC1-6alkyl; R2 is hydrogen or C1-4alkyl; n is 2 or 3; X is S or —CH2—; R3 is C1-4alkyl; R4 is hydrogen, or a phenyl group, a heterocyclyl group, a 5- or 6-membered heteroaromatic group, or a 8- to 11-membered bicyclic group, any of which groups is optionally substituted by 1, 2, 3 or 4 substituents selected from the group consisting of: halogen, cyano, C1-4alkyl, haloC1-4alkyl, C1-4alkoxy and C1-4alkanoyl; R5 is isoxazolyl, —CH2—N-pyrrolyl, 1,1-dioxido-2-isothiazolidinyl, thienyl, thiazolyl, pyridyl or 2-pyrrolidinonyl, wherein each group is optionally substituted by one or two substituents selected from: halogen, cyano, C1-4alkyl, haloC1-4alkyl, C1-4alkoxy and C1-4alkanoyl; with the proviso that when m5=m6=1, R7 is not chlorine; processes for their preparation, intermediates used in these processes, pharmaceutical compositions containing them and their use in therapy, as modulators of dopamine D3 receptors, e.g. to treat substance related disorders, as antipsychotic agents, premature ejaculation or cognition impairment.