Evaluate toxicity of pyrazoloacridine. Weekly prior to each treatment cycle. [clinicaltrials_resource:f35cf3782fbcce7b0fe99adb33fe084d]

Pyrazoloacridine 750 mg/m2 by 3 hour infusion, every 21 day s in the absence of progressive disease or prohibitive toxicity.

Evaluate toxicity of pyrazoloacridine. Weekly prior to each treatment cycle. [clinicaltrials_resource:f35cf3782fbcce7b0fe99adb33fe084d]

Pyrazoloacridine 750 mg/m2 by 3 hour infusion, every 21 day s in the absence of progressive disease or prohibitive toxicity.