Isoxerocomic acid

Isoxerocomic acid is a red-orange pigment found in Boletales. It is the precursor to variegatic acid, and is preceded by atromentic acid and atromentin.^[2] As an example, it is isolated from Serpula lacrymans. It is soluble in methanol. It is the isomer of xerocomic acid and precursor to xerocomorubin.^[2][3]

Isoxerocomic acid

Names
Preferred IUPAC name (E)-(3,4-Dihydroxyphenyl)[3-hydroxy-4-(4-hydroxyphenyl)-5-oxofuran-2(5H)-ylidene]acetic acid
Identifiers
CAS Number	27711-61-1[1] N
3D model (JSmol)	Interactive image
ChemSpider	129557841
PubChem CID	102235612
CompTox Dashboard (EPA)	DTXSID301337190
InChI InChI=1S/C18H12O8/c19-10-4-1-8(2-5-10)13-15(22)16(26-18(13)25)14(17(23)24)9-3-6-11(20)12(21)7-9/h1-7,19-22H,(H,23,24)/b16-14+ Key: LTTYWERVHIDGQN-JQIJEIRASA-N
SMILES OC(=O)C(=C1\OC(=O)C(=C1O)C1=CC=C(O)C=C1)\C1=CC=C(O)C(O)=C1
Properties
Chemical formula	C18H12O8
Molar mass	356.2831
Melting point	295 °C (563 °F; 568 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references