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2021
It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.
The Cover Feature shows the synthesis of NH-δ-lactams through three-component Castagnoli–Cushman reaction of 3-arylglutaconic anhydrides with carbonyl compound and ammonium acetate. The way chemical building blocks are united to form the desired heterocyclic product is compared to the famous tile-matching Tetris game. More information can be found in the Communication by M. Krasavin et al.