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Pretreatment of skin with oleic acid or laurocapram led to statistically significant differences in the transdermal flux of esculetin with respect to controls .
 Chemical: oleic acid; Chemical: laurocapram; Chemical: esculetin
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: oleic acid; Chemical: laurocapram; Chemical: esculetin