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Synthesis and biological characterization of spiro [ 2H - ( 1 , 3 ) - benzoxazine - 2 , 4 ' - piperidine ] based histone deacetylase inhibitors .
 Chemical: spiro [ 2H - ( 1 , 3 ) - benzoxazine - 2 , 4 ' - piperidine ]
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: spiro [ 2H - ( 1 , 3 ) - benzoxazine - 2 , 4 ' - piperidine ]