AZD5312 will be given intravenously (IV) as an infusion, over one hour. For the purpose of planning, each 4 week period (28 days) will be called a Cycle. AZD5312 will initially be administered 4 times within the first 11 days, (on Days [1, 4, 8 and 11]± 2), with no dosing on sequential days. Patients will receive weekly treatments on Days 15 and 22 to complete Cycle.