Pentacyanidoferrate(III) complex of metformin provides a simple colorimetric test for this important anti-hypoglycemic medicament - Hennemann, Artur Luís; Ramos Junior, Miguel Domingos; Sihn, Luca Michael; Nakamura, Marcelo; Formiga, André L. B; Toma, Henrique Eisi (Results in Chemistry, 2024)