1-Oxa-1-dethia-cephalosporin derivatives

1-Oxa-4,8-diazaspiro[4,5]decanes and polymers stabilized against

1-Oxa-4-azaspiro[4,5]decanes as light stabilizers for polymers

1-Oxacephems

1-Oxides of Schiff bases of 6-aminopenicillanic acid

1-Oxo-1H-2-benzothiopyran-3-carboxylic acid derivatives

1-Oxo-1H-6-piperidinopyrimido[1,2-a]quinoline-2-carboxylic acids

1-Oxo-2,2-disubstituted-5-indanyloxy(or thio)alkanoic acids

1-Oxo-2,2-[dialkylphosphono(alkyl)alkyloxy]-1,2-diphenylethane

1-Oxo-2-(phosphona)-1,2-diphenylethanes

1-Oxo-3-methyl-2-butene phosphonic acid esters

1-Phenoxy-1-[halo-1,2,4-triazolyl-(1)]-3,3-dimethyl-butan-2-ones

1-Phenoxy-2-hydroxy-3-alkynylamino-propanes and salts thereof

1-Phenoxy-[imidazolyl-(1)]-2-hydroxy-alkanes

1-Phenyl-1-p-propargyloxyphenyl-2-nitro-ethane derivatives

1-Phenyl-2,2,4,4-C.sub.1 -C.sub.2 alkyl-3-[4-(phenyl or pyridyl)

1-Phenyl-2-(Naphthylalkyl-amino)-ethanols and salts thereof

1-Phenyl-2-amino-1,3-propanediol-N-aryloxyalkyl derivatives

1-Phenyl-3,4-dihydrocarbostyrils

1-Phenyl-3-azabicyclo[3.1.0]hexanes