AT: "at" In the anti-time future, the USS Pasteur (NCC-58925) was a Federation Olympic-class hospital ship that was in service with Starfleet in the late 24th century. The Pasteur was constructed by the Skywalker Division at the Marin County Starfleet Yards, and was commanded by Captain Beverly Picard. In the primary timeline, the Pasteur was commanded by Captain James A. Watson from 2363-2366, an unknown captain from 2366-2371, and Captain Watson again from 2371-2377.
In the anti-time future, the ship was destroyed by two Klingon attack cruisers after the Pasteur crossed the Klingon border to scan the Devron system for a temporal anomaly. However, the survivors of the attack were rescued beforehand by the USS Enterprise-D, under the command of Admiral William T. Riker. Among the Pasteur's crew of that timeline was Ensign Nell Chilton, who died during the Klingon attack. (TNG: "All Good Things...")