8503
Rapid ligand - based virtual screening ( LBVS ) of GDB - 17 using the city - block distance CBD ( MQN ) as a similarity search measure was enabled by a hashed MQN - fingerprint .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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