[GeLe5000]

Thank you for the link.

Of course Aspirin is not an important source of energy in our body. But this metabolic pathway was mentioned in a pharmacology book and this annoyed me for the following reason.
I'm testing different compounds on the growth of protozoan cultures.
No surprise : Glucose increases their divison rate. The same with Vitamin C.
But more interesting : Aspirin also increases the division rate. So, I must ask myself it's because of a production of energy from this molecule. For now, I haven't managed to find a way of answering this question.
Also interesting : Ibuprofen is toxic down to 0.0001 M. That's another problem. And according to the literature, Paracetamol, which I haven't tested yet, could do the same.
That's why I'm glad to have found here the basic chemistry : correct combustion equations.

[AWK]

Of course, bacteria, fungi or protozoa may use quite odd compounds as source of carbon and nitrogen (if they are not toxic for them).