Description:We developed a computational metabolomics workflow to characterize metabolite structures by using the set of fully 13C-labelled and non-labelled LC-MS/MS data. The platform was applied to structure elucidations for 31 tissues of 12 plant species, resulting in the assignments of 1,092 structures and 344 formulas to 3,604 carbon-determined metabolite ions. We also applied the methodology to find the trait-metabolite associations in natural accessions of Arabidopsis thaliana.