The invention provides compounds of formula (I), in which R1 and R2 are independently selected from H, alkyl, aryl and heteroaryl, or R1 and R2 together form a C5-C7 ring, R3-R7 are independently selected from H, halogen, alkyl and alkoxy, X is (CH2)n in which n is 0-5, Y is selected from CH2, NR8, O or S in which R8 is H or alkyl, salts thereof and stereoisomers thereof, for the prophylaxis or treatment of malaria.
