8910
Eight novel 4 , 5 - tetrahydropyrazolo [ 1 , 5 - d ] [ 1 , 4 ] oxazepine derivatives have been synthesized and purified to be screened for anticancer activity .
 Chemical: 4 , 5 - tetrahydropyrazolo [ 1 , 5 - d ] [ 1 , 4 ] oxazepine
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 , 5 - tetrahydropyrazolo [ 1 , 5 - d ] [ 1 , 4 ] oxazepine