tert-butyl (3-(5-ethyl-5-(3-hydroxypropyl)cyclopent-1-en-1-yl)propyl)carbamate

tert-butyl (3-(5-ethyl-5-(3-iodopropyl)cyclopent-1-en-1-yl)propyl)carbamate

tert-butyl 7a-ethyl-2,3,5,6,7,7a,8,9-octahydrocyclopenta[e]azonine-4(1H)-carboxylate

3-(1-(tert-butoxycarbonyl)-5-ethyl-6-oxoazonan-5-yl)propanoic acid

tert-butyl 5-ethyl-5-(3-methoxy-3-oxopropyl)-6-oxoazonane-1-carboxylate