17764
The number of conformers and their structures of tyrosine are reassigned on the basis of resonance enhanced multiphoton ionization ( REMPI ) , ultraviolet - ultraviolet hole burning ( UV - UV HB ) , infrared ( IR ) dip spectra , and quantum chemical calculations .
 Chemical: tyrosine
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: tyrosine