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The naturally derived cyanotoxin , cylindrospermopsin ( CYN ) , has been detected in freshwater systems worldwide and poses a threat to human health .
 Chemical: cylindrospermopsin; Chemical: CYN
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: cylindrospermopsin; Chemical: CYN