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.

Contribution of the Na+-K+-2Cl- cotransporter NKCC1 to Cl- secretion in rat OMCD.
Cl-

High-mannose-type glycan modifications of dihydrofolate reductase using glycan-methotrexate conjugates.
dihydrofolate

Preclinical and clinical development of the oral multikinase inhibitor sorafenib in cancer treatment.

sorafenib

