15268
Photothermal tautomerization of a UV sunscreen ( 4 - tert - butyl - 4 ' - methoxydibenzoylmethane ) in acetonitrile studied by steady - state and laser flash photolysis .
 Chemical: 4 - tert - butyl - 4 ' - methoxydibenzoylmethane; Chemical: acetonitrile
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: 4 - tert - butyl - 4 ' - methoxydibenzoylmethane; Chemical: acetonitrile