Chrysanthemic acid

Chrysanthemic acid
Names
	IUPAC name 2,2-Dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylic acid
Identifiers
CAS Number	4638-92-0 (1R,3R) or (+)-trans ; 2259-14-5 (1S,3S) or (−)-trans ; 26771-11-9 (1R,3S) or (+)-cis ; 26771-06-2 (1S,3R) or (−)-cis ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL1437285;
ChemSpider	15876 (+)-trans; 19543 (−)-cis;
ECHA InfoCard	100.022.788
PubChem CID	16747 (1R,3R) or (+)-trans; 33607 (1S,3S) or (−)-trans; 33606 (1R,3S) or (+)-cis; 20755 (1S,3R) or (−)-cis;
UNII	23FP207VLY (1R,3R) or (+)-trans ; 75957WZ15Y (1S,3S) or (−)-trans ; 5P7V8620AM (1R,3S) or (+)-cis ; TFK3B71TRY (1S,3R) or (−)-cis ;
CompTox Dashboard (EPA)	DTXSID101033188 DTXSID60883558, DTXSID101033188 ;
	InChI InChI=1S/C10H16O2/c1-6(2)5-7-8(9(11)12)10(7,3)4/h5,7-8H,1-4H3,(H,11,12)/t7-,8+/m0/s1 Key: XLOPRKKSAJMMEW-JGVFFNPUSA-N;
	SMILES CC(=CC1C(C1(C)C)C(=O)O)C;
Properties
Chemical formula	C10H16O2
Molar mass	168.236 g·mol−1
Melting point	17 °C (63 °F; 290 K) (1R,3R) or (+)-trans
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chrysanthemic acid is an organic compound that is related to a variety of natural and synthetic insecticides. It is related to the pyrethrin I and II, as well as the pyrethroids. One of the four stereoisomers, (1R,3R)- or (+)-trans-chrysanthemic acid (pictured), is the acid part of the ester pyrethrin I, which occurs naturally in the seed cases of Chrysanthemum cinerariaefolium. Many synthetic pyrethroids, for example the allethrins, are esters of all four stereoisomers. Staudinger and Ružička named chrysanthemic acid in 1924.