The estate of the late New York state senator Roy Goodman — the grandson of Israel Matz, founder of Ex-Lax — has sold his eighth-floor unit at 1035 Fifth Ave. for around $10 million to Rainer Kirchgaessner, global corporate development officer for ACE Group, a publicly traded insurance company.

It was asking $11.55 million.

The four-bedroom co-op in a J.E.R. Carpenter-designed prewar building has Central Park views and a formal dining room.