28094
Preparation of S14161 and its analogues and the discovery of 6 - bromo - 8 - ethoxy - 3 - nitro - 2H - chromene as a more potent antitumor agent in vitro .
 Chemical: S14161; Chemical: 6 - bromo - 8 - ethoxy - 3 - nitro - 2H - chromene
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: S14161, 6 - bromo - 8 - ethoxy - 3 - nitro - 2H - chromene 
Answer:
 Chemical: S14161; Chemical: 6 - bromo - 8 - ethoxy - 3 - nitro - 2H - chromene