2-(1,4-dioxonaphthalen-2-yl)sulfanylacetic acid

2,3,5,6,-tetrahydronaphtho[1,2-b:4,3-b']bis[1,4]oxathiin-2,7-dione

2-(4-methoxybenzoyl)sulfanylacetic acid

N-methyl-N-phenyl-2-sulfanylacetamide

2-(4-nitrobenzoyl)sulfanylacetic acid