A Randomized Multi-Center Open Label Study of BMS-354825 vs. Imatinib Mesylate (Gleevec) 800 mg/d in Subjects With Chronic Phase Philadelphia Chromosome-Positive Chronic Myeloid Leukemia Who Have Disease That is Resistant to Imatinib at a Dose at 400 - 600 mg/d

Inclusion Criteria:

- Men and women, 18 years of age or older.

- Subjects with Chronic Phase Ph+ CML.

- Subjects have not been treated with imatinib at a dose >600 mg/day.

- Subjects developed resistance to disease while receiving an imatinib dose 400-600
mg/day.

- Able to tolerate imatinib at the highest dose the subject had received in the past.

- Demonstrate adequate renal and hepatic function.

- Women of childbearing potential must have a negative serum or urine pregnancy test,
must be using an adequate method of contraception.

Exclusion Criteria:

- Women who are unwilling or unable to use an acceptable method to avoid pregnancy for
the entire study period for a least 1 month before and at least 3 months after the
completion of the study.

- Women using a prohibited contraceptive method.

- Women who are pregnant or breastfeeding.

- Men whose sexual partners are women who are of childbearing potential, and who are
unwilling or unable to use an acceptable method to avoid pregnancy of his partner for
the entire study period as outlined above.

- Prior treatment with imatinib at a dose >600 mg/day.

- Subjects who have previously identified specific BCR-ABL mutations.

- Previous diagnosis of accelerated phase or blast crisis CML.

- Intolerance to imatinib at any dose.

- Subjects who are eligible and willing to undergo transplantation during the screening
period.

- Serious uncontrolled medical disorder or active infection.

- Uncontrolled or significant cardiovascular disease.

- Uncontrolled hypertension.

- Dementia or altered mental status.

- Evidence of organ dysfunction.

- Use of imatinib within 7 days.

- Use of interferon or cytarabine within 14 days.

- Use of a targeted small molecule anticancer agent within 14 days.

- Subjects taking certain medications that are accepted to have a risk of causing
Torsades de Pointes.

- Subjects taking medications that irreversibly inhibit platelet function or
anticoagulants.

- Prior therapy with BMS-354825.