5-Methyl-7-methoxyisoflavone

5-Methyl-7-methoxyisoflavone, commonly referred to simply as methoxyisoflavone, is a chemical compound marketed as a bodybuilding supplement. However, there is no meaningful clinical evidence to support its usefulness.^[1][2] A study published in 2006 examined the effect of methoxyflavone on training adaptations and markers of muscle anabolism and catabolism. No measurable effects were observed in athletic performance or in levels of testosterone and cortisol.^[3]

5-Methyl-7-methoxyisoflavone

Names
IUPAC name 7-Methoxy-5-methylisoflavone
Systematic IUPAC name 7-Methoxy-5-methyl-3-phenyl-4H-1-benzopyran-4-one
Other names Methoxyisoflavone
Identifiers
CAS Number	82517-12-2 Y
3D model (JSmol)	Interactive image
ChemSpider	2016043
ECHA InfoCard	100.126.888
PubChem CID	2734290
UNII	NHW23TRU3M Y
CompTox Dashboard (EPA)	DTXSID201002754
InChI InChI=1S/C17H14O3/c1-11-8-13(19-2)9-15-16(11)17(18)14(10-20-15)12-6-4-3-5-7-12/h3-10H,1-2H3 Key: WGOUYULOZZRTFS-UHFFFAOYSA-N InChI=1/C17H14O3/c1-11-8-13(19-2)9-15-16(11)17(18)14(10-20-15)12-6-4-3-5-7-12/h3-10H,1-2H3 Key: WGOUYULOZZRTFS-UHFFFAOYAN
SMILES O=C\1c3c(O/C=C/1c2ccccc2)cc(OC)cc3C
Properties
Chemical formula	C17H14O3
Molar mass	266.296 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Consumption of 5-methyl-7-methoxyisoflavone can produce false positive results in urinary tests for cannabinoid use.^[4][5]