propyyhryhmä
Propyyhryhmä is a term that appears to be a misspelling or a non-standard transliteration, likely related to the Finnish word "propyyli" which refers to the propyl group. The propyl group is a three-carbon alkyl substituent with the general formula -CH2CH2CH3 (n-propyl) or -CH(CH3)2 (isopropyl). In organic chemistry, substituents like the propyl group are attached to a parent molecule and influence its properties.
The term "propyyhryhmä" might arise from a phonetic attempt to spell or pronounce "propyyliryhmä," where "ryhmä"