In this task, you are given a sentence. You are expected to recognize the name of any form of chemical substances. Although there might be several correct answers, you need to write one of them.

Q: Mifepristone alters expression of endometrial steroid receptors and their cofactors in new users of medroxyprogesterone acetate.

A: steroid
****
Q: The ability of sorafenib to inhibit oncogenic PDGFRbeta and FLT3 mutants and overcome resistance to other small molecule inhibitors.

A: sorafenib
****
Q: Benzodiazepine receptor binding of triazolobenzodiazepines in vivo: increased receptor number with low-dose alprazolam.

A:
triazolobenzodiazepines
****