PATIENT CHARACTERISTICS: Age: 18 and over Performance status: SWOG 0-2 Life expectancy: At least 12 weeks Hematopoietic: Absolute neutrophil count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hemoglobin at least 9.0 g/dL No coagulation disorders Hepatic: Bilirubin normal AST and ALT no greater than 3 times upper limit of normal (ULN) (no greater than 5 times ULN if liver involvement) PT or INR, and PTT normal Renal: Creatinine no greater than 1.5 mg/dL Cardiovascular: No cardiac conduction abnormalities Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No active or uncontrolled infection No other concurrent severe disease No known hypersensitivity to SR-45023A analogs No concurrent or recent (within past 6 months) small bowel obstruction, symptoms of small bowel obstruction, or any other gastrointestinal disease impacting absorption of study drug No psychiatric disorders or geographic distance that would prevent compliance