FR 2514 then SN 3728 at Madrid
Bucharest → Madrid → Brussels
Timetable, Madrid time
00:45FR 2514 from Bucharest at the gate
17:30SN 3728 to Brussels leaves the gate
16 h 45 apart on the timetable
SN 3728 leaves 16 h 45 after FR 2514 arrives on the timetable: more than half a day, so not a connection we count.