/usr/include/OpenMS/ANALYSIS/DENOVO/ is in libopenms-dev 1.11.1-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/OpenMS/ANALYSIS/DENOVO/CompNovoIdentification.h
/usr/include/OpenMS/ANALYSIS/DENOVO/CompNovoIdentificationBase.h
/usr/include/OpenMS/ANALYSIS/DENOVO/CompNovoIdentificationCID.h
/usr/include/OpenMS/ANALYSIS/DENOVO/CompNovoIonScoring.h
/usr/include/OpenMS/ANALYSIS/DENOVO/CompNovoIonScoringBase.h
/usr/include/OpenMS/ANALYSIS/DENOVO/CompNovoIonScoringCID.h
/usr/include/OpenMS/ANALYSIS/DENOVO/DeNovoAlgorithm.h
/usr/include/OpenMS/ANALYSIS/DENOVO/DeNovoIdentification.h
/usr/include/OpenMS/ANALYSIS/DENOVO/DeNovoIonScoring.h
/usr/include/OpenMS/ANALYSIS/DENOVO/DeNovoPostScoring.h
/usr/include/OpenMS/ANALYSIS/DENOVO/sources.cmake