levulinic acid molecule. made by degradation of cellulose, potential precursor to biofuels

levulinic acid levulinate oxopentanoic oxopentanoate keto cellulose biofuel 4oxopentanoic laevulinic acetylpropionic acetopropionic ketovaleric hexose starch precursor hydrogen carbon oxygen molecule atoms atomic model molecular compound composition chemical chemistry bond structure formula circle ring line drawing skeletal flat icon stylized style