Molecular Complexity from Aromatics - An Efficient Route to 1,8-Dimethyl-5-spirocyclopropanetricyclo[6.3.0.0²,6]undec-10-one: A Potential Intermediate for Synthesis of Ceratopicanol - Singh, Vishwakarma; Chandra, Girish; Mobin, Shaikh M. (Synlett, 2008)