1822
Galantamine is a reversible , competitive acetylcholinesterase ( AChE ) inhibitor and allosteric potentiating ligand of nicotinic acetylcholine receptors ( nAChR - APL ) that shares many common structural elements with morphinan - based opioids .
 Chemical: Galantamine; Chemical: acetylcholine; Chemical: morphinan
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Galantamine; Chemical: acetylcholine; Chemical: morphinan