ethyl 3-ethylsulfanyl-2-methyl-3-oxopropanoate

2,3-bis(ethylsulfanyl)naphthalene-1,4-dione

2-(hexadecylsulfanyl)-3-(ethylsulfanyl)-1,4-naphthoquinone

2,3-bis(hexadecylsulfanyl)-1,4-naphthoquinone

1,4-dihydroxy-2,3-dithioethylnaphthalene