Correct spelling for the English word "kairolin" is [kˈa͡ɪɹəlˌɪn], [kˈaɪɹəlˌɪn], [k_ˈaɪ_ɹ_ə_l_ˌɪ_n] (IPA phonetic alphabet).
Chinolin-methyl hydrate, C10H15N, possessing antipyretic properties.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.