Logstash csv fields


Howcan I escape special characters in CSV filter field names , I tries with backslash it is not working.
I need column names with double quotes for few field names as below
csv {

	 columns => ["timeStamp","elapsed","label","responseCode","responseMessage","\"tc_status\""]
             separator => ","  	

This is a Logstash question so I am going to move it to the Logstash category where you are more likely to find an answer to your question