N-(4-sulfanilyl-phenyl)-glycine ethyl ester
N-[4-(4-nitro-benzenesulfonyl)-phenyl]-N-(toluene-4-sulfonyl)-glycine ethyl ester
N-[4-(4-nitro-phenylsulfanyl)-phenyl]-N-(toluene-4-sulfonyl)-glycine ethyl ester
4'-nitro-4-N-tosylaminodiphenyl sulfide
N-[4-(4-nitro-benzenesulfonyl)-phenyl]-glycine ethyl ester