4-Nitrophenyl α-L-rhamnopyranoside

4-Nitrophenyl α-L-rhamnopyranoside is a commonly used substrate in various biochemical assays to measure the activity of enzymes that hydrolyze rhamnose, such as α-L-rhamnosidase. 4-Nitrophenyl α-L-rhamnopyranoside has unique chemical properties that allow it to be hydrolyzed by these enzymes to form a yellow product called p-nitrophenol. This makes it a useful tool for detecting and quantifying rhamnohydrolase activity in biological samples or microbial cultures.