2540
( S ) - 2 - pentyl - 4 - pentynoic acid is more apoptogenic than VPA and displays enantioselective anti - cancer properties that warrant further research regarding the mechanistic basis of its activity and its potential use in cancer therapy .
 Chemical: ( S ) - 2 - pentyl - 4 - pentynoic acid; Chemical: VPA
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: ( S ) - 2 - pentyl - 4 - pentynoic acid, VPA 
Answer:
 Chemical: ( S ) - 2 - pentyl - 4 - pentynoic acid; Chemical: VPA