6746
Thousands of analogs have been synthesized on the basis of cantharidin , a part of which shows excellent properties , in particular , norcantharidin and norcantharimide .
 Chemical: cantharidin; Chemical: norcantharidin; Chemical: norcantharimide
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: cantharidin; Chemical: norcantharidin; Chemical: norcantharimide