Source:http://linkedlifedata.com/resource/umls/id/C0029252
MSH: A class of compounds of the type R-M, where a C atom is joined directly to any other element except H, C, N, O, F, Cl, Br, I, or At. (Grant & Hackh's Chemical Dictionary, 5th ed),CSP: organic compound containing a metal linked to carbon.,NCI: A class of metal-containing organic compounds, where a C atom is joined directly to the metal.