1. Adenine: This is a nitrogenous base, one of the building blocks of DNA and RNA.

2. Ribose: This is a five-carbon sugar.

3. Triphosphate group: This is a chain of three phosphate groups.

The energy stored in ATP is primarily located within the bonds between the phosphate groups. When a phosphate group is removed (by breaking one of these bonds), energy is released. This energy can then be used by the cell to power various processes.