"Choletelin" is not a phonetically regular word and therefore cannot be accurately transcribed using the International Phonetic Alphabet (IPA). It is possible that this word may be a misspelling or a neologism. In any case, it is important to use precise spelling when communicating in written form to ensure clarity and accuracy in conveying information.
Bilixanthin.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.