The word "betol" is often misspelled as "bethol" or "beatol." However, the correct spelling is /ˈbɛtoʊl/. The first syllable is pronounced with the short e sound /ɛ/, followed by the stressed long o sound /oʊ/ in the second syllable. The final syllable ends with the unvoiced /l/ sound. "Betol" is a term used in chemistry to refer to a compound called betulinol, which is found in birch bark and has potential medicinal properties.
Naphthyl salicylate.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.