Xantocillin (INN), also known as xanthocillin X or ophthocillin, was the first reported natural product found to contain the isocyanide functional group. It was first isolated from Penicillium notatum by Westling in 1950 and subsequently from several other sources.
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- ^ Paul J. Scheuer (1992). "Isocyanides and cyanides as natural products". Accounts of Chemical Research 25 (10): 433–439. doi:10.1021/ar00022a001.
- ^ Kozlovskiĭ AG, Zhelifonova VP, Antipova TV, Adanin VM, Novikova ND, Deshevaia EA et al. (2004). "[Penicillium expansum, a resident fungal strain of the orbital complex Mir, producing xanthocillin X and questiomycin A].". Prikl Biokhim Mikrobiol 40 (3): 344–9. PMID 15283339.