In the case of our own QM9 extension, out of 2163 calculations, 99 failed for various reasons. Since QM9-extended database was published during our own calculations related to this article, there appeared to be an overlap of 290 molecules. In these cases, while combining the results of calculations with QM9-extended database, properties from QM9-extended were considered as bearing priority and taken into the research. The resulting database of quantum properties (QM9-extended-plus) contained 155468 compounds with 11 calculated properties.