# Terms And Abbreviations Terms and abbreviations commonly used in CropMetaDB. ### LC-MS liquid chromatography-mass spectrometry ### LC-MS/MS liquid chromatography tandem-mass spectrometry ### MS2T library MS/MS spectral tag (MS2T) library. MS2T libraries of CropMetaDB contains MS/MS spectra of known metabolites and unknown metabolites from crops. ### MS2T Accession Label Each MS2T accession was labeled in the format ‘RE0147p′ for example; this denotes the 147th spectrum (0147) derived from the library of rice (RE) extracts obtained in the positive ion mode (p, positive). ### IUPAC International Union of Pure and Applied Chemistry ### InChI IUPAC International Chemical Identifier ### SMILES Simplified Molecular Input Line Entry Specification ### **PubChem** a public database of chemicals and chemical information ### CID PubChem ID ### **KEGG** Kyoto Encyclopedia of Genes and Genomes --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://cropmetaweb.gitbook.io/cropsmeta/terms-and-abbreviations.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.