1-Oxa-3,9-diazaspiro[5.5]undecan-2-one
6-Benzyl-8-oxa-2,6-diazaspiro[4.5]decan-7-one
tert-Butyl 2-oxo-1-oxa-3,9-diazaspiro[5.5]undecane-9-carboxylate
5-(4-Methoxyphenyl)-3-methyl-1-oxa-3-azaspiro[5.5]undecane
9-Benzyl-5-phenyl-1-oxa-3,9-diazaspiro[5.5]undecan-2-one
9-Benzyl-1-oxa-3,9-diazaspiro[5.5]undecan-2-one
5-Oxa-7-azaspiro[2.5]octan-6-one
