👉 Cyanine, also known as 4-nitro-3-(2-methylpropan-1-yl)-5H-pyrimidin-3-one (NPP), is a chemical compound that has been used in various fields such as medicine, biology, and nanotechnology. It is a dye that is produced by the reaction of N,N-diaminoacetamide with 4-nitrophenol. This compound can be used to visualize cells or other biological materials