I have identified 3368 metabolites and only 626 metabolites are named. I want to find the class of these metabolites. Suggest me a database from where I can find the classification for identified metabolites.
Rather than given it a vague verbal label, why not compare with other correlations in your field that the readers of your work will know? (Maybe one higher, one lower). There are some conventions for verbal labels for correlations, but they do not translate well across contexts.