20505
As a potent synthetic APN inhibitor ( IC50 = 850nM , versus bestatin of 8 . 1 mu M ) , LB - 4b was determined to have more significant block effects to cancer cell invasion and angiogenesis than bestatin .
 Chemical: bestatin; Chemical: LB - 4b; Chemical: bestatin
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: bestatin; Chemical: LB - 4b; Chemical: bestatin