Xantocillin

Xantocillin
Names
	Preferred IUPAC name 4,4′-[(1Z,3Z)-2,3-Diisocyanobuta-1,3-diene-1,4-diyl]diphenol
	Other names Xanthocillin X, Ophthocillin
Identifiers
CAS Number	580-74-5 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL1977264;
ChemSpider	21106491;
PubChem CID	5378293;
UNII	06Z55VZ40D ;
CompTox Dashboard (EPA)	DTXSID801018149 ;
	SMILES [C-]#[N+]C(=CC1=CC=C(C=C1)O)C(=CC2=CC=C(C=C2)O)[N+]#[C-];
Properties
Chemical formula	C18H12N2O2
Molar mass	288.306 g·mol−1
Appearance	Yellow crystals
Melting point	200 °C (392 °F; 473 K) (decomposes)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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 Rothe in 1950 and subsequently from several other sources.