Carnosic acid

Names

IUPAC name 11,12-Dihydroxyabieta-8,11,13-trien-20-oic acid

Systematic IUPAC name (4aR,10aS)-5,6-Dihydroxy-1,1-dimethyl-7-(propan-2-yl)-1,3,4,9,10,10a-hexahydrophenanthrene-4a(2H)-carboxylic acid

Other names Salvin

Identifiers

CAS NumberY

3D model (JSmol)

ChEBIN

ChEMBLN

ChemSpiderN

ECHA InfoCard

PubChem CID

UNIIN

CompTox Dashboard (EPA)

InChI InChI=1S/C20H28O4/c1-11(2)13-10-12-6-7-14-19(3,4)8-5-9-20(14,18(23)24)15(12)17(22)16(13)21/h10-11,14,21-22H,5-9H2,1-4H3,(H,23,24)/t14-,20+/m0/s1NKey:QRYRORQUOLYVBU-VBKZILBWSA-NNInChI=1/C20H28O4/c1-11(2)13-10-12-6-7-14-19(3,4)8-5-9-20(14,18(23)24)15(12)17(22)16(13)21/h10-11,14,21-22H,5-9H2,1-4H3,(H,23,24)/t14-,20+/m0/s1Key:QRYRORQUOLYVBU-VBKZILBWBB

SMILES CC(C)C1=C(C(=C2C(=C1)CCC3C2(CCCC3(C)C)C(=O)O)O)O

Properties

Chemical formulaC20H28O4

Molar mass332.440g·mol−1

Melting point185 to 190°C (365 to 374°F; 458 to 463K)

Except where otherwise noted, data are given for materials in their standard state (at 25°C [77°F], 100kPa). Nverify(what isYN?) Infobox references

Carnosic acid is a natural benzenediol abietane diterpene found in rosemary (Salvia rosmarinus) and common sage (Salvia officinalis). Dried leaves of rosemary and sage contain 1.5 to 2.5% carnosic acid.

Carnosic acid and carnosol, a derivative of the acid, are used as antioxidant preservatives in food and nonfood products, where they're labelled as "extracts of rosemary" (E392).