17002
A concise synthesis of pyrazole analogues of combretastatin A1 as potent anti - tubulin agents .
 Chemical: pyrazole; Chemical: combretastatin A1
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: pyrazole; Chemical: combretastatin A1