OUTLINE: This is a dose escalation study. Patients receive KRN5500 IV over 1 hour on days 1-3. Courses repeat every 21 days. Patients with stable disease and partial or complete remission continue treatment for 6 months beyond complete remission. Cohorts of 3 to 6 patients receive escalating doses of KRN5500. The maximum tolerated dose is defined as the dose preceding that at which at least 2 of 6 patients experience dose limiting toxicity.