Using Regex.Replace in Unityscript to remove punctuation

I am attempting to replace a series of punctuation characters within a string with a space instead. After googling and using these forums people seem to recommend regex.replace but this always gives me the 'expected a semi-colon' error. I have also read that regex is not supported in Unityscript but get conflicting information on this.

 import System.Text.RegularExpressions;
 
 function CheckText() {
 var punctuationRegex : Regex("< |> |&");
     myString = punctuationRegex.Replace(myString, " ");
 }