Acetoacetic acid (AcAc) is a weak organic acid that can be produced in the human liver under certain conditions of poor metabolism leading to excessive fatty acid breakdown (diabetes mellitus leading to diabetic ketoacidosis).

Tidembersat is a small molecule compound used to treat and/or prevent degenerative diseases such as Huntington's chorea, schizophrenia, neurological.

Trioxsalen is a furanocoumarin and a psoralen derivative, in conjunction with UV-A for phototherapy treatment of vitiligo and hand eczema.