甲基锂 、
1,5,6,7-Tetramethyl-4-[2-(1,5,6,7-tetramethyl-4-oxo-2-bicyclo[3.2.0]hepta-2,6-dienyl)ethyl]bicyclo[3.2.0]hepta-3,6-dien-2-one 以71%的产率得到4-[2-(4-hydroxy-1,4,5,6,7-pentamethyl-2-bicyclo[3.2.0]hepta-2,6-dienyl)ethyl]-1,2,5,6,7-pentamethylbicyclo[3.2.0]hepta-3,6-dien-2-ol