[‚byüd·ə‚pī·rə′näk·səl] (organic chemistry) C12H18O4 A yellow to amber liquid with a boiling point of 256-260°C; miscible with ether, glacial acetic acid, alcohol, and chloroform; used as an insect repellent for skin and clothing.
butopyronoxyl
bu·to·py·ro·nox·yl
(byū'tō-pī'rō-nok'sil), An insect repellent, effective against the biting stable fly (Stomoxys calcitrans).