/usr/lib/ is in librdkit-dev 201603.5+dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libDistGeomHelpers.so
/usr/lib/libDistGeometry.so
/usr/lib/libEigenSolvers.so
/usr/lib/libFMCS.so
/usr/lib/libFileParsers.so
/usr/lib/libFilterCatalog.so
/usr/lib/libFingerprints.so
/usr/lib/libForceField.so
/usr/lib/libForceFieldHelpers.so
/usr/lib/libFragCatalog.so
/usr/lib/libGraphMol.so
/usr/lib/libInfoTheory.so
/usr/lib/libMMPA.so
/usr/lib/libMolAlign.so
/usr/lib/libMolCatalog.so
/usr/lib/libMolChemicalFeatures.so
/usr/lib/libMolDraw2D.so
/usr/lib/libMolHash.so
/usr/lib/libMolTransforms.so
/usr/lib/libOptimizer.so
/usr/lib/libPartialCharges.so
/usr/lib/libRDBoost.so
/usr/lib/libRDGeneral.so
/usr/lib/libRDGeometryLib.so
/usr/lib/libReducedGraphs.so
/usr/lib/libSLNParse.so
/usr/lib/libShapeHelpers.so
/usr/lib/libSimDivPickers.so
/usr/lib/libSmilesParse.so
/usr/lib/libSubgraphs.so
/usr/lib/libSubstructMatch.so
/usr/lib/libhc.so
/usr/lib/libAlignment.so
/usr/lib/libCatalogs.so
/usr/lib/libChemReactions.so
/usr/lib/libChemTransforms.so
/usr/lib/libChemicalFeatures.so
/usr/lib/libDataStructs.so
/usr/lib/libDepictor.so
/usr/lib/libDescriptors.so