Changes in version 1.0.5 (2026-01-21) - fix export.ComboundDb functionality bugs - bring CIDs in from PubChemLite as an added data source to expand exogenous compound coverage. Changes in version 1.0.4 - enable reporting of multiple LCA's in pubchem.bio tables - add reporting of LCA name(s) in pubchem.bio tables - add option in build.pubchem.bio to use the neutral child rather than the parent, even if 'use.parent' option is TRUE. - updated cid.lca.rda data to include lca.level column, used moving forward and reported in pubchem.bio object output. Changes in version 1.0.3 (2025-12-12) - added export.CompoundDb function to enable 'conversion to a CompoundDb' sqlite database and compatibility with the RForMassSpectrometry metapackage - added export.CompoundDb demonstration to vignette Changes in version 1.0.2 - added build.element.count function - added filtering demonstration to vignette Changes in version 1.0.1 (2025-08-31) - corrected data.table namespace problem - improve robustness of pathway data download Changes in version 1.0.0 (2025-08-28) - Initial CRAN submission.