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.

Example Input: Aryl hydrocarbon receptor is a target of 17-Allylamino-17-demethoxygeldanamycin and enhances its anticancer activity in lung adenocarcinoma cells.
Example Output: 17-Allylamino-17-demethoxygeldanamycin

Example Input: The (R)-omeprazole hydroxylation index reflects CYP2C19 activity in healthy Japanese volunteers.
Example Output: (R)-omeprazole

Example Input: The Hsp90-specific inhibitor geldanamycin selectively disrupts kinase-mediated signaling events of T-lymphocyte activation.
Example Output:
geldanamycin