Jim Rocca for Dr. QiYin Chen, Luesch Group, Medicinal Chemistry. FE28AB-2-M7-26.8min, MW=1020. 1H and 13C. He estimated 0.5-mg by weight, though I suspect it may be less because I estimated about 0.5-mg the last time before another HPLC purification. I saved a 13C spectrum at 26-hours which was adequate for QiYin to decide the sample needs additional purification.