Statistics Graphs showing the growth of ChEBI, the numbers of curated, submitted and unchecked entries, the numbers of links to other resources and the sources of the information present in ChEBI
SDF files ChEBI provides its chemical structures and additional data in structure-data file (SDF) format.
Database files ChEBI is stored in a relational database and we currently provide the ChEBI tables in flat-file tab delimited format, as an Oracle binary dumps and a generic SQL dumps for MySQL and PostgreSQL database.
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Throughout the 19th Century, chemists tried to organise the known elements so as to reflect similarities in their properties. In 1864, the British chemist John Newlands (1837–1898) arranged the elements in order of increasing atomic weight. He noticed that elements with similar physical and chemical properties occurred after each interval of seven elements (the inert gases were still unknown). He likened this periodicity to the musical scale, but his "Law of Octaves" was initially ridiculed .