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A simple , precise , specific and sensitive method was developed for simultaneous quantification of picrosides I and II in rat plasma and was applied for the pharmacokinetic study .
 Chemical: picrosides I and II
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: picrosides I and II