How to define a command in nagios with special characters

I have been trying to define a command in nagios with the command name including special characters like <<CheckFileSize>>. The problem is when I am running pre-flight check on configuration data it gives me error as below

Checking commands...
Error: The name of command '<<CheckFileSize>>" contains one or more illegal characters.
        Checked 32 commands.

command definition:
++++++++++++++++++
define command {
  command_name  <<CheckFileSize>>
  command_line  check_nrpe -H $HOSTADDRESS$ -p 5666 -c CheckFileSize -a ShowAll MinWarn=$ARG2$  MinCrit=$ARG1$ File=c:/pagefile.sys
}