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.

Input: Consider Input: Development of hypoxia-inducible factor (HIF)-1α inhibitors: effect of ortho-carborane substituents on HIF transcriptional activity under hypoxia.

Output: ortho-carborane


Input: Consider Input: Synthesis of derivatives of methyl rosmarinate and their inhibitory activities against matrix metalloproteinase-1 (MMP-1).

Output: methyl rosmarinate


Input: Consider Input: Efficacy and safety of the factor VIII/von Willebrand factor concentrate, haemate-P/humate-P: ristocetin cofactor unit dosing in patients with von Willebrand disease.


Output: ristocetin