Translation help SAS -> SPSS

[Frank Furter]

Unfortunately I am not very well familiar with SAS syntax. What would be the nearest approximation in SPSS to the following SAS statement:

Proc mixed data=mydata;
class sequence subject period treatment;
model outcome=sequence period treatment baseline/ddfm=kenwardroger;
random subject(sequence);
lsmeans treatment/pdiff cl alpha=0.05;
estimate 'Treatment effect' treat -1 1;
run;

Thanks a lot
Andreas Voelp