30402
Brevetoxin B ( BTX - B ) , produced by dinoflagellates of the species Karenia , is a highly reactive molecule , due in part to an alpha , beta - unsaturated aldehyde group at the terminal side chain , leading to the production of metabolites by reduction , oxidation , and conjugation .
 Chemical: Brevetoxin B; Chemical: BTX - B; Chemical: alpha , beta - unsaturated aldehyde
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: Brevetoxin B, BTX - B, alpha , beta - unsaturated aldehyde 
Answer:
 Chemical: Brevetoxin B; Chemical: BTX - B; Chemical: alpha , beta - unsaturated aldehyde