Correct spelling for the English word "captol" is [kˈaptɒl], [kˈaptɒl], [k_ˈa_p_t_ɒ_l] (IPA phonetic alphabet).
Tannochloral; trade name for a compound of chloral hydrate and tannin; astringent and parasiticide.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.