p. 4217 - 4230
(2007/10/02)p. 381 - 387
(2007/10/02)ethyl 1-methyl-2-oxocyclopentane-1-carboxylate
(6-Methyl-1,4-dioxa-spiro[4.4]non-6-yl)-methanol
2-Methyl-2-tosyloxymethylcyclopentanon-aethylenketal
2-Hydroxymethyl-2-methyl-cyclopentan-1-one
p-toluenesulfonyl chloride