ethyl 3-pyridin-3-ylprop-2-ynoate

2-chloro-3-ethoxynaphthalene-1,4-dione

methyl 4,9-dioxo-4,9-dihydronaphtho[2,3-d]isoxazole-3-carboxylate

2-(octadecylthio)-3-chloro-1,4-naphthoquinone

2-(octadecylthio)-3-(ethoxy)-1,4-naphthoquinone