15176
To determine the mechanism for the observed effects of lup - 20 ( 29 ) - en - 3 - one , the tyrosinase enzyme activity , the tyrosinase protein expression , and the activation of phosphorylated extracellular signal - regulated kinases 1 and 2 were determined .
 Chemical: lup - 20 ( 29 ) - en - 3 - one
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: lup - 20 ( 29 ) - en - 3 - one