dose escalation study of 06-benzylguanine (BG) and carmustine (BCNU) Courses (each course is 3 weeks) repeat every 6 weeks in the absence of disease progression or unacceptable toxicity. Cohorts of 1-3 patients receive escalating doses of BG until the biochemical modulation dose l (BMDl) is determined. [clinicaltrials_resource:b6a2eaf264d4d58230bc1bb41472cf3c]

Patients receive BG IV over 1 hour during week 1, and then BG IV over 1 hour during week 3. Courses repeat every 6 weeks in the absence of disease progression or unacceptable toxicity.

dose escalation study of 06-benzylguanine (BG) and carmustine (BCNU) Courses (each course is 3 weeks) repeat every 6 weeks in the absence of disease progression or unacceptable toxicity. Cohorts of 1-3 patients receive escalating doses of BG until the biochemical modulation dose l (BMDl) is determined. [clinicaltrials_resource:b6a2eaf264d4d58230bc1bb41472cf3c]

Patients receive BG IV over 1 hour during week 1, and then BG IV over 1 hour during week 3. Courses repeat every 6 weeks in the absence of disease progression or unacceptable toxicity.