Philadelphia Chromosome Positive CML Patients Without Optimal Response or Tolerance to Bcr-Abl TKI

A Phase I/II multicenter study of IY5511HCl in Philadelphia chromosome positive chronic myeloid leukemia patients without optimal response or tolerance to Bcr-Abl tyrosine kinase inhibitors (Imatinib and/ or Dasatinib, Nilotinib) In this study, The efficacy and safety of CML patients who are resistant or intolerable to imatinib in the Chronic and Accelerated phases. Phase 1 1\. To investigate the Maximum Tolerated Dose (MTD) and the Dose Limiting Toxicity (DLT) of oral Radotinib HCl bid (twice daily) in the Philadelphia chromosome-positive CML subjects who are resistant, suboptimal responsive, or intolerant to imatinib OR resistant or intolerant to at least one second-generation targeted anticancer agent while being resistant, suboptimal responsive, or intolerant to imatinib simultaneously. Phase 2 1. To investigate safety of oral Radotinib HCl in CML patients who are resistant or intolerable to imatinib in the chronic and accelerated phases. 2. To evaluate hematologic and cytogenetic efficacy of oral Radotinib HCl in CML patients who are resistant or intolerable to imatinib in the chronic and accelerated phases.