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Objective of this study was to prepare , characterize and evaluate a self - microemulsifying drug delivery system ( SMEDDS ) with the aim to improve the solubility and dissolution of apigenin .
 Chemical: apigenin
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: apigenin