matrix presented Ozonolysis of 1 largely results in 2 and 3, having features similar to several classes of natural products. The retention of the C15 pericycle suggests preference for the cleavage of π-bonds endo to the cyclopentane ring. This unique property of trindane offers opportunities for synthesis of complex natural products from this hydrocarbon that can be made in quantity by acid-catalyzed trimerizatiion of cyclopentanone.