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((more citations needed|date=October 2014))
((chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 417210567
| Name = Carnosic acid
| ImageFile = Carnosic acid.svg
| ImageName = Chemical structure of carnosic acid
| ImageAlt = Chemical structure of carnosic acid
| IUPACName = 11,12-Dihydroxyabieta-8,11,13-trien-20-oic acid
| SystematicName = (4a''R'',10a''S'')-5,6-Dihydroxy-1,1-dimethyl-7-(propan-2-yl)-1,3,4,9,10,10a-hexahydrophenanthrene-4a(2''H'')-carboxylic acid
| OtherNames = Salvin
|Section1=((Chembox Identifiers
| CASNo = 3650-09-7
| CASNo_Ref = ((cascite|correct|??))
| CASNoOther = 
| UNII_Ref = ((fdacite|changed|FDA))
| UNII = LI791SXT24
| PubChem = 65126
| ChEBI_Ref = ((ebicite|changed|EBI))
| ChEBI = 65585
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| ChEMBL = 484853
| SMILES = CC(C)C1=C(C(=C2C(=C1)CCC3C2(CCCC3(C)C)C(=O)O)O)O
| ChemSpiderID_Ref = ((chemspidercite|changed|chemspider))
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| InChI = 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/s1
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| StdInChIKey_Ref = ((stdinchicite|changed|chemspider))
| StdInChIKey = QRYRORQUOLYVBU-VBKZILBWSA-N
| MeSHName = 
))
|Section2=((Chembox Properties
| C=20 | H=28 | O=4
| Appearance = 
| Density = 
| MeltingPtC = 185 to 190
| BoilingPt = 
| Solubility = 
))
|Section3=((Chembox Hazards
| MainHazards =  
| FlashPt =  
| AutoignitionPt =  
))
))

'''Carnosic acid''' is a natural [[benzenediol]] [[abietane]] [[diterpene]] found in rosemary (''[[Rosmarinus officinalis]]'') and common sage (''[[Salvia officinalis]]'').<ref>((cite journal |last1 =Schwarz |first1 =Karin |last2 =Ternes |first2 =Waldemar |title =Antioxidative constituents of Rosmarinus officinalis and Salvia officinalis |doi =10.1007/BF01201766 |pmid =1529648 |journal =Zeitschrift für Lebensmittel-Untersuchung und -Forschung |year =1992 |volume =195 |issue =2 | pages= 99–103|s2cid =100385294 ))</ref> 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]] [[preservative]]s in food and nonfood products, where they're labelled as "extracts of rosemary" ([[E number|E]]392).<ref>((Cite journal |last1=Birtić |first1=Simona |last2=Dussort |first2=Pierre |last3=Pierre |first3=François-Xavier |last4=Bily |first4=Antoine C. |last5=Roller |first5=Marc |date=2015-07-01 |title=Carnosic acid |journal=Phytochemistry |language=en |volume=115 |pages=9–19 |doi=10.1016/j.phytochem.2014.12.026 |pmid=25639596 |bibcode=2015PChem.115....9B |issn=0031-9422|doi-access=free ))</ref>

== References ==
((reflist))

[[Category:Phenol antioxidants]]
[[Category:Diterpenes]]
[[Category:Phenanthrenes]]
[[Category:Isopropyl compounds]]
[[Category:Carboxylic acids]]
[[Category:Catechols]]

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