4-Hydroxy-5-methyl-3(2H)-furanone19322-27-1100 % similar 2-Hydroxy-3-methyl-2-cyclopenten-1-one80-71-740 % similar Homofuraneol27538-10-936 % similar Acetoxyacetic acid13831-30-635 % similar Furaneol3658-77-335 % similar 3-Ethyl-2-hydroxy-2-cyclopenten-1-one21835-01-833 % similar Glycolide502-97-631 % similar