Cyclopentanecarboxylic acid, 2-hydroxy-, methyl ester

ethyl 2-((methylsulfonyl)oxy)cyclopentane-1-carboxylate

2-diazonio-3-oxocyclohexen-1-olate

2-phenyl-6,7-dihydro-5H-cyclopenta[e][1,3]oxazin-4-one

2-(Bis-methylsulfanyl-methylene)-cyclopentanone