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: Expression and 1,4-dihydropyridine-binding properties of brain L-type calcium channel isoforms.
Example Output: calcium

Example Input: PICK1 Deficiency Impairs Secretory Vesicle Biogenesis and Leads to Growth Retardation and Decreased Glucose Tolerance.
Example Output: Glucose

Example Input: Investigation of astatine(III) hydrolyzed species: experiments and relativistic calculations.
Example Output:
astatine(III)