Hexacyclen, also known as Cycloolefin, is an organic compound with a unique macrocyclic structure composed of six nitrogen-containing rings. It serves as a chelating agent in chemistry and biochemistry due to its ability to bind metal ions and functions as an inhibitor for certain diseases like cancer. In biochemistry, Hexacyclen is utilized to selectively bind metal ions within proteins or enzymes, aiding in the study of their structure and function. Due to its large size and complex structure, Hexacyclen is not widely used in everyday products or applications.