The chemical structure is the clue to the explosive potential. The N-N-N triad is a strange beast that shows up in a lot of explosive materials. They're explosive for similar reasons that ammonia nitrate is explosive.

https://www.newscientist.com/article/dn23399-texas-disaster-...

Think of energy as a vertical scale increasing upward. Including a nitrogen triad (like in the drug) pushes the entire molecule up on the energy scale. It's like riding the elevator to the 42nd floor.

In contrast, the N-N triple bond (i.e., atmospheric nitrogen) is way down at the ground floor. This is one reason that despite nitrogen being the most abundant gas in the earth's atmosphere, it requires large amounts of energy to process into fertilizers and other materials.

CO2 and H2O also sit near ground level. So there's a large energy difference between the drug and the combustion products N2, CO2, and H2O.

All it takes to release all of that stored energy is a trigger. For example, if someone were to push you off the top of the building, you would spontaneously release the stored energy. Hopefully you'd be equipped with an air braking device to dissipate it gradually, but if not - well, that energy will be released into your body and the pavement all at once.