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

5-allyl-5-ethylcyclopent-1-en-1-yl trifluoromethanesulfonate

tert-butyl (3-(5-allyl-5-ethylcyclopent-1-en-1-yl)propyl)carbamate

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