6011
This effect is abolished by the selective 5 - HTR7 antagonist SB - 269970 , by the ERK inhibitor U0126 , by the cyclin - dependent kinase 5 ( Cdk5 ) inhibitor roscovitine , as well as by cycloheximide , an inhibitor of protein synthesis .
 Chemical: SB - 269970; Chemical: U0126; Chemical: roscovitine; Chemical: cycloheximide
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: SB - 269970, U0126, roscovitine, cycloheximide 
Answer:
 Chemical: SB - 269970; Chemical: U0126; Chemical: roscovitine; Chemical: cycloheximide