One downside of this approach lies in the low number of conventional names reported on the CSD side. In many cases, authors do not specify the conventional name used in the publication as metadata during the deposition to the CSD, meaning that a conventional name may have been used on the NIST-ISODB side that is not present in the CSD. In other cases, the publication reporting the crystal structure may not mention a conventional name either, in which case the name reported in the NIST-ISODB is typically chosen as the chemical formula of the unit cell, for example C 66 H 50 B 2 CoCu 6 N 18 O 24 or C 11 H 12 GdO 11 . In these cases, it is clearly harder to identify the same material in other publications, as it will likely be labelled with a conventional name or with a formula in a different format. Moreover, two MOFs can have a the same formula but different topology, giving rise to different gas adsorption properties.