Ennio Morricone's Ancora Qui first seconds

I feel the first piano musical notes, the very first secondes of Ancora Qui come from another classical music that’d be as famous as Ancora Qui. Unfortunately, I don’t know which song and I have no proof, but it sounds like a deja vu, or a already listened actually.

Am I totally wrong and does Morricone is the original creator of these notes?

Ancora Qui — YouTube