incorrect syntax for multiple statement inside if

I tried to modify my batch code to catch more cases. I have a line that checks input, and I wanted to have a specific initialization for a specific input

This is the input call:

:: get user input
set /p ph="Enter phase (e.g: 7, 8, 81, 82, 9, vs2, vs3): "

This is the initialization:

::(loc2, loc3, synergy are all variables I use in different places)
    if %ph%==vs2(
        set loc2=C:\mp_4m_ph2
        set loc3=C:\mp_4m_ph2\mp_4m
        set synergy=C:\synergy\mp4m_ph2
        )

Result:

The syntax of the command is incorrect.

I don't understand what's going wrong here, since I used if before: if %wantbackup%==n (goto start_delete) and that worked fine

If I remove this if entirely there are no errors. I also verified this is the location of the problem by echo 1 just before the if and inside it. Only the before part printed.