No it's not.
In our company preflight is 1hr before ETD, and post flight 30 min after ETA. Could be different, refer to your OM part A.
Given 3 hours of split duty (1800z-2100z, considering pre and post flight, supposing an adequate crew rest facility is available) you have 1,5 hrs of extension (half the split duty).
You begin FDP at 1100z, 1500 lt, that gives you with two sectors 12 hrs of duty, plus 1,5 of extension= 13,5 hrs.
You should be on blocks at midnight to be FTL compliant.
Cheers!