... cyclopentenolone, 1-acetyloxy-2-propanone, 2-methyl-3-hydroxy-2-pyrone, 2-methoxy- 4- methylanisole, 4-OH-3-methoxybenzaldehyde, maltol, etc. (Diebold 2000).Inorganic components can be present in bio-oil in ... ethanol, 2-propene-1-ol, isobutanol, 3-methyl-1-bu-•tanol, ethylene glycol, etc.Ketones: acetone, 2-butanone, 2-butanone (mek), 2,3-butandione, cyclo-•pentanone, 2-pentanone, 3-pentanone, 2-cyclopentanone, ... acetaldehyde, 2-propenal, 2-butenal, 2- methyl-•2-butenal, pentanal, ethanedial.Phenols: phenol, 2-methyl phenol, 3-methyl phenol, 4-methyl phenol, •2,3-dimethyl phenol, 2,4-dimethyl phenol, 2 , 5- dimethyl...