(3β)-D-Friedoolean-14-en-3-ol

熊果酸

2,3,4,5-Tetramethyltetracyclo[4.4.0.02,4.03,5]deca-7,9-dien-1,6-dicarbonsaeureanhydrid

tetramethyl-phthalic acid

1-bromo-2,3,4,5-tetramethylbenzene