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

Example Input: Two pharmacologically distinct alpha 1-adrenoceptor subtypes in the contraction of rabbit aorta: each subtype couples with a different Ca2+ signalling mechanism and plays a different physiological role.
Example Output: alpha 1-adrenoceptor

Example Input: Aminopropylindenes derived from Grundmann's ketone as a novel chemotype of oxidosqualene cyclase inhibitors.
Example Output: oxidosqualene cyclase

Example Input: Hexahydrochromeno[4,3-b]pyrrole derivatives as acetylcholinesterase inhibitors.
Example Output:
acetylcholinesterase