Fillup cell depending on value of another cell

So I want to fill up certain cells with certain values. I want to use the IF function. I have the following data:

4271423/421424/4237168/4246332=D917/F2224271423/421424/4237168/4253485=D917/F222/J0084271423/421424/4237168/4246332/4224002=D917/F222/J008/F2144271423/421424=D9174246332=F222

I made this function:

=IF(F:F="4271423/421424/4237168/4246332","D917/F222",IF(F:F=,"4271423/421424/4237168/4253485","D917/F222/J008",IF(F:F="4271423/421424/4237168/4246332/4224002","D917/F222/J008/F214",IF(F:F="4271423/421424","D917",IF(F:F="4271423/421424/4237168","D917/F222",IF(F:F="4246332","F222")))))))