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MassBank Human is a database of product ion spectra obtained from metabolome datasets.
Product ion spectra were generated from each DDA or IDA dataset in the metabolome data repositories.
Levels of m/z accuracy and S/N of product ions were improved by the spectral averaging [1].
The MassBank Human database includes product ion spectra of "Known-knowns," "Known-Unknowns," and "Unknown-unknowns."

[1]https://doi.org/10.5702/massspectrometry.A0106