17003
Combretastatin A1 ( CA1 ) binds to the beta - subunit at the colchicine binding site of tubulin and inhibits polymerization .
 Chemical: Combretastatin A1; Chemical: CA1; Chemical: colchicine
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: Combretastatin A1; Chemical: CA1; Chemical: colchicine