Nordihydroguaiaretic acid

Nordihydroguaiaretic acid
Names
	IUPAC name 4,4'-(2,3-Dimethylbutane-1,4-diyl)dibenzene-1,2-diol
Identifiers
CAS Number	500-38-9 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:7625 ;
ChEMBL	ChEMBL52 ;
ECHA InfoCard	100.007.185
IUPHAR/BPS	4265;
MeSH	Nordihydroguaiaretic+acid
PubChem CID	4534;
UNII	7BO8G1BYQU ;
CompTox Dashboard (EPA)	DTXSID5022437 ;
	InChI InChI=1S/C18H22O4/c1-11(7-13-3-5-15(19)17(21)9-13)12(2)8-14-4-6-16(20)18(22)10-14/h3-6,9-12,19-22H,7-8H2,1-2H3 Key: HCZKYJDFEPMADG-UHFFFAOYSA-N;
	SMILES Oc2ccc(CC(C)C(C)Cc1ccc(O)c(O)c1)cc2O;
Properties
Chemical formula	C18H22O4
Molar mass	302.370 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Nordihydroguaiaretic acid (NDGA) is a classic lignan, a phenylpropane dimer linked by a bond between positions C8 and C8′, as opposed to a neolignan. It is a natural compound found in the creosote bush (Larrea tridentata).