Patients will undergo a screening period of up to 4 weeks. Patients who are deemed eligible will be entered into the study and undergo treatment with G-202. G-202 will be administered by intravenous infusion over one hour on Days 1, 2 and 3 of a 28-day treatment cycle. The G-202 dose will be 40 mg/m2 on Day 1 and 66.8 mg/m2 on Days 2 and 3.