p-bis(1-oxyl-2,2,6,6-tetramethyl-Δ3-4-piperidylethynyl)benzene

Benzoic acid 2,2,6,6-tetramethyl-4-trifluoromethanesulfonyloxy-3,6-dihydro-2H-pyridin-1-yl ester

Acetic acid 4-[4-(1-acetoxy-2,2,6,6-tetramethyl-1,2,3,6-tetrahydro-pyridin-4-ylethynyl)-phenylethynyl]-2,2,6,6-tetramethyl-3,6-dihydro-2H-pyridin-1-yl ester

4,4'-(1,4-phenylenebis(ethyne-2,1-diyl))bis(2,2,6,6-tetramethylpiperidin-4-ol)

(1,4-phenylenebis(ethyne-2,1-diyl))bis(2,2,6,6-tetramethyl-3,6-dihydropyridine-4,1(2H)-diyl) dibenzoate

p-bis(2,2,6,6-tetramethyl-Δ3-4-piperidylethynyl)benzene

4,4'-(1,4-phenylenebis(ethyne-2,1-diyl))bis(2,2,6,6-tetramethyl-3,6-dihydropyridin-1(2H)-ol)

Acetic acid 4-[4-(1-acetoxy-4-hydroxy-2,2,6,6-tetramethyl-piperidin-4-ylethynyl)-phenylethynyl]-4-hydroxy-2,2,6,6-tetramethyl-piperidin-1-yl ester