“Mannoheptulose, glucosamine, diazoxide, NAD, glucose, epinephrine, 3,5-dimethylpyrazole, 3-carboxy-5-methylpyrazole, glutamic acid, glycine, asparagine, cysteine, sodium tolbutamide, guanidoacetic acid, glutathione, p-aminobenzoic acid, and ethyl alcohol were ineffective as blocking agents.”