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[ - ] - Huperzine A ( [ - ] - Hup A ) , is a naturally occurring potent reversible AChE inhibitor that penetrates the blood - brain barrier .
 Chemical: [ - ] - Huperzine A; Chemical: [ - ] - Hup A
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: [ - ] - Huperzine A; Chemical: [ - ] - Hup A