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2020
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.
Abstract Three-component condensation of substituted 4-oxochromene-3-carbaldehydes with sarcosine and fullerene C60 afforded 2′-(4-oxochromen-3-yl)-1′-methyl-2′,5′-dihydro-1′H-pyrrolo[3′,4′:1,9](C60-Ih)[5,6]fullerenes. The structure of the synthesized compounds was studied by 1H and 13C NMR spectroscopy, including 1H–1H COSY and 1H–13C HMQC experiments.