icacls command to remove multiple users permissions from a folder at one icacls command in win 2008 R2

hi friends

in win2008 R2, i want to know is it possible to remove multiple users permissions from security tab of a folder at once ?  ( at one icacls command ? )

for example in my C: drive, i have a folder called "MyFolder" to which the user1 and person2 and teacher3 have Modify permission.

i want to remove their permissions from MyFolder at once.  i tried this command but it doesn't work :

icacls c:\MyFolder /remove:g user1,person2,teacher3      doesn't work.

any solution please

thanks in advance