Because tea is a mixture of different compounds, rather than a pure compound itself, the full chemical breakdown of tea isn't predictable. There is no one chemical formula to describe all teas. Instead, there are thousands of different molecules in a single drop of brewed tea, making all teas different.
One of the most easily recognizable and highly sought-after chemicals in tea is caffeine. It exists naturally in most tea leaves in various concentrations. Because tea is made by stripping plant leaves of their biochemical compounds, the tea itself contains many different types of vitamins, minerals, proteins, sugars, fats and even nucleic acids.