16813
Here , we report the discovery and optimization of triaryl sulfonamides as a novel series possessing significant CB2 receptor affinity and selectivity .
 Chemical: triaryl sulfonamides
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: triaryl sulfonamides 
Answer:
 Chemical: triaryl sulfonamides