And being naive about the whole field, I kind of thought, "" Oh, you have cell death in Alzheimer's which is causing the memory deficit, and then you have this compound — purine derivatives — that are promoting cell growth. "" And so I thought, "" Maybe if it can promote cell growth, it can inhibit cell death, too. "" And so that's the project that I pursued for that year, and it's continuing now as well, and found that a specific purine derivative called "" guanidine "" had inhibited the cell growth by approximately 60 percent.