(thiophene-2,5-diylbis(ethyne-2,1-diyl))bis(2,2,6,6-tetramethyl-3,6-dihydropyridine-4,1(2H)-diyl) dibenzoate

4,4'-(furan-2,5-diylbis(ethyne-2,1-diyl))bis(2,2,6,6-tetramethyl-3,6-dihydropyridin-1(2H)-ol)

4,4'-(thiophene-2,5-diylbis(ethyne-2,1-diyl))bis(2,2,6,6-tetramethyl-3,6-dihydropyridin-1(2H)-ol)

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

Acetic acid 4-[2-(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