Urea derivatives are chemical compounds that are derived from urea, a simple organic compound with the formula CO(NH₂)₂. These derivatives are formed by modifying the urea molecule, often by replacing one or more of its hydrogen atoms with other functional groups. This modification can enhance their properties and make them useful in various applications, including pharmaceuticals and agriculture. Common examples of urea derivatives include biuret, thiourea, and urea-formaldehyde resins. These compounds can serve as fertilizers, adhesives, or even as intermediates in the synthesis of more complex molecules. Their versatility makes them important in both industrial and research settings.