18521
We evaluated the effect of the demethylating agent 5 - aza - 2 ' - deoxycytidine ( 5AzadC ) and the histone deacetylase inhibitor trichostatin A ( TSA ) on PR expression in human astrocytoma cell lines U373 ( grade III ) and D54 ( grade IV ) by RT - PCR and Western blot .
 Chemical: 5 - aza - 2 ' - deoxycytidine; Chemical: 5AzadC; Chemical: trichostatin A; Chemical: TSA
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: 5 - aza - 2 ' - deoxycytidine; Chemical: 5AzadC; Chemical: trichostatin A; Chemical: TSA