During the first 29 days of the study, you will give 16 blood samples (about 1 teaspoon each) for pharmacokinetic (PK) testing. PK testing measures the amount of study drug in the blood at different times. On Cycle 1 Day 1, blood will be drawn 3 hours after the drug is given. On Cycle 1 Day 3, blood will be drawn before the infusion, 1 hour after the drug is given, at the end of the infusion, and again 20 minutes, 1 hour, 3 hours, and between 4-6 hours after the end of the infusion. On Cycle 1 Days 4-6, blood will be drawn on 1 occasion. On Cycle 2 Day 8, blood will be drawn before the infusion, and at the end of the infusion. On Cycle 2 Day 15, blood will be drawn before the infusion, then again 3, 9, and 24 hours later. The last PK test will be drawn either at the time of your biopsy (Part B or C only) or before the next dose of study drug is given on Day 29.