The invention relates to medical uses of a compound of general formula (I), (I) or a pharmaceutically acceptable salt thereof, wherein R1 and R2, which can be the same group or a different group, are independently a
hydroxy group or a methoxy group or, taken together, a
methylenedioxy group, R3 and R4, which can be the same group or a different group, are independently a
hydroxy group or a methoxy group, R5 is
phenyl group, and R6 is a
phenyl group, wherein said phenyl groups are independently optionally substituted, and wherein n is 2, and to pharmaceutical compositions comprising said compound of general formula (I), for use in the treatment of
cancer in a human subject, wherein said compound of general formula (I) is administered in a therapeutically effective
dose to said human subject. The invention is also related to medical uses of pharmaceutical compositions comprising said compound of general formula (I) or said pharmaceutically acceptable salt thereof.