car-302,668 car-302,668 car-302,668 (302668, α-isopropylmandelic acid (1-methyl-1,2,3,6-tetrahydro-4-pyridyl)methyl ester) is an anticholinergic deliriant drug, invented under contract to edgewood arsenal in the 1960s. it is a reasonably potent incapacitating agent with an ed50 of 4μg/kg and a long duration of action of around 16-24 hours. car-302,668identifiers iupac name (1-methyl-3,6-dihydro-2h-pyridin-4-yl)methyl 2-hydroxy-3-methyl-2-phenylbutanoate cas number93101-83-8pubchem cid56556chemspider51020chemical and physical dataformulac18h25no3molar mass303.402 g·mol−13d model (jsmol)interactive image smiles cc(c)c(c1=cc=cc=c1)(c(=o)occ2=ccn(cc2)c)o inchi inchi=1s/c18h25no3/c1-14(2)18(21,16-7-5-4-6-8-16)17(20)22-13-15-9-11-19(3)12-10-15/h4-9,14,21h,10-13h2,1-3h3key:vzcberxkhilzbm-uhfffaoysa-n