A Study of Oral Sapacitabine in Patients With Previously Treated Non-Small Cell Lung Cancer

Inclusion Criteria:

* Histologically or cytologically confirmed recurrent NSCLC
* Age of 18 years or older
* Eastern Cooperative Oncology Group (ECOG) performance status 0-2
* Measurable disease according to RECIST
* Had only 1 prior chemotherapy regimen for metastatic or recurrent disease; patients who have received more than one prior chemotherapy regimens may participate in Part A of the study only.
* Adequate bone marrow function
* Adequate renal function
* Adequate liver function
* At least 3 weeks from prior systemic treatments including investigational anti-cancer therapy; at least 7 days from prior radiation therapy; and have recovered from prior toxicities
* At least 3 weeks from major surgery
* Patient must be able to swallow capsules
* Agree to practice effective contraception during the entire study period and for one month after being discontinued from the study unless documentation of infertility exists. Should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately
* Ability to understand and willingness to sign the informed consent form

Exclusion Criteria:

* NSCLC histology contains a component of small cell lung cancer
* Previously untreated CNS metastasis or progressive CNS metastasis documented by MRI scan performed at 4 weeks or longer after the last treatment for CNS metastasis
* Currently receiving radiotherapy, biological therapy, or any other investigational agents
* Uncontrolled intercurrent illness including, but not limited to ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
* Cancer other than NSCLC that has been treated with chemotherapy or biological therapy in the past 5 years with the exception of adequately treated in situ cervical cancer, and basal or squamous cell skin cancer; patients who received only hormonal therapy in the neoadjuvant or adjuvant setting in the past 5 years may participate in this study
* Pregnant or lactating women
* Known to be HIV-positive