toluenesulfonic acid and the like u201c therapeutically effective amount u201d means an amount that is effective to prevent alleviate or ameliorate symptoms of disease or prolong the survival of the subject being treated the compounds mentioned below are specific novel and preferred for the uses as described above preferred compounds of formula i are those wherein x is a bond preferred compounds of this group of formula i are those wherein y is phenyl substituted by one or more halogen atoms r 1 is halogen for n gt 1 the halogen atoms are the same or different s 4 2 chloro phenyl 4 5 dihydro oxazol 2 ylamine rs 4 4 chloro phenyl 4 5 dihydro oxazol 2 ylamine rs 4 2 4 difluoro phenyl 4 5 dihydro oxazol 2 ylamine s 4 2 3 difluoro phenyl 4 5 dihydro oxazol 2 ylamine rs 4 3 4 dichlorophenyl 4 5 dihydro oxazol 2 ylamine rs 4 2 5 difluoro phenyl 4 5 dihydro oxazol 2 ylamine rs 4 2 3 4 trifluoro phenyl 4 5 dihydro oxazol 2 ylamine rs 4 3 chloro 2 fluoro phenyl 4 5 dihydro oxazol 2 ylamine rs 4 5 chloro 2 fluoro phenyl 4 5 dihydro oxazol 2 ylamine.