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ebi.ac.uk
methanediyl (CHEBI:29357). Chemical Entities of Biological Interest. UK: European Bioinformatics Institute. IUPAC Names. 14 January 2009 [2 January 2012]. (原始内容存档于2016-02-06).
methanediyl (CHEBI:29357). Chemical Entities of Biological Interest. UK: European Bioinformatics Institute. IUPAC Names. 14 January 2009 [2 January 2012]. (原始内容存档于2016-02-06).