Metabolome Annotation Workflow (MAW) takes liquid chromatography tandem mass spectrometry data (LC-MS2) as .mzML format data files. It performs spectral database dereplication using R Package Spectra and compound database dereplication using MetFrag/SIRIUS. Final candidate selection is executed in Python using RDKit and PubChemPy. The classification of the tentative candidates from the input data are classified using ChemONT chemical ontology.