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Compound 3 , derived from the 7 - methylindazole core , afforded a 30 - fold increase in CGRP binding potency compared with its unsubstituted indazole analog 1 .
 Chemical: 7 - methylindazole; Chemical: indazole
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: 7 - methylindazole; Chemical: indazole