20279
Characterization of the first K ( + ) channel blockers from the venom of the Moroccan scorpion Buthus occitanus Paris .
 Chemical: K ( + )
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: K ( + )