“A 30 ….1 mM CuCl2 suppressed responses to single concentrations of the following sweeteners: L-alanine, L-proline, D-tryptophan, …, L-valine, glycine, sucrose, maltose, lactose, tetrachloro-galacto-sucrose, glucose, fructose, methyl alpha-D-glucopyranoside, glycerol , sorbitol, sodium saccharin, L-4'-cyano-3'-(… acetamido)succinanilic acid, phenethyurea, and stevioside.”