OUTLINE: This is a dose escalation study. Patients receive oral COL-3 once daily. Treatment continues in the absence of disease progression and unacceptable toxic effects. Cohorts of 3-6 patients each receive escalating doses of COL-3. Dose escalation to the next level occurs after 3 patients have completed 28 days of treatment without dose limiting toxicity (DLT). Dose escalation continues until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 2 or more of 6 patients experience DLT.