24195
Discovery of a series of novel 5H - pyrrolo [ 2 , 3 - b ] pyrazine - 2 - phenyl ethers , as potent JAK3 kinase inhibitors .
 Chemical: 5H - pyrrolo [ 2 , 3 - b ] pyrazine - 2 - phenyl ethers
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: 5H - pyrrolo [ 2 , 3 - b ] pyrazine - 2 - phenyl ethers 
Answer:
 Chemical: 5H - pyrrolo [ 2 , 3 - b ] pyrazine - 2 - phenyl ethers