Chemical biology is an interdisciplinary field that combines principles and techniques from chemistry and biology to study the interactions between small molecules and biological systems. It focuses on understanding the molecular mechanisms that underlie biological processes, as well as the development of chemical tools and probes to manipulate these processes. Chemical biologists often use a variety of techniques such as chemical synthesis, spectroscopy, and imaging to study the roles of small molecules in biological systems, and to design new molecules for therapeutic use or as research tools. Overall, chemical biology aims to bridge the gap between chemistry and biology to gain a deeper understanding of how the chemical properties of molecules influence their biological activity.