Today on Crain’s Daily Gist, host Amy Guth talks with Crain’s Chicago Business commercial real estate reporter Danny Ecker about the sudden closing of popular North Side staple Stanley’s Fruit and Vegetables after 52 years. Plus: the Chicago Board of Trade building is going up for sale, Walgreens plans to raise the tobacco-buying age to 21, U of C med-tech spinout Explorer Surgical raises $5 million, Samsung delays the launch of the Galaxy Fold after screen failures, UIC gets $65 million to commercialize novel drugs and Chicago security firm Hillard Heintze is acquired by Jensen Hughes. Follow host Amy Guth on Twitter at @AmyGuth, or continue the conversation with #CrainsDailyGist.