4,5-Diphenyl-1,3-dioxol-2-one21240-34-630 % similar m-Xylene-formaldehyde resin26139-75-330 % similar Tropolone tosylate38768-08-030 % similar 3,6-Dimethylcarbazole5599-50-830 % similar Xanthone90-47-130 % similar