14108
The present study provides an extension of the previously developed concept of purity - activity relationships ( PARs ) and enables the quantitative evaluation of the effects of multiple minor components on the bioactivity of residually complex natural products .
 None
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:  
Answer:
 None