Coach's Challenge: OTT @ TOR - 18:49 of Third Period

At 18:49 of the third period in the Senators/Maple Leafs game, Toronto requested a Coach's Challenge to review whether Bobby Ryan interfered with Toronto goaltender Frederik Andersen before the puck entered the net.
After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee confirmed no goaltender interference infractions occurred before the puck crossed the goal line.

Therefore the original call stands - good goal Ottawa Senators.
Since the Coach's Challenge did not result in the original call being overturned, the Toronto Maple Leafs forfeit their time-out.