EC 7152 then LA 5746 at Barcelona
Milan → Barcelona → Firenze
Timetable, Barcelona time
14:25EC 7152 from Milan at the gate
10:45LA 5746 to Firenze leaves the gate
20 h 20 apart on the timetable, overnight
LA 5746 leaves 20 h 20 after EC 7152 arrives on the timetable: more than half a day, so not a connection we count.