Amidoxime and O-substituted derivatives of the bis-alkylamidine 1, 12-bis (N, N′- acetamidinyl) dodecane were synthesized and evaluated as in vitro and in vivo antimalarial prodrugs. The bis-O-methylsulfonylamidoxime 8 and the bis-oxadiazolone 9 derivatives show relatively potent antimalarial activity after oral administration.