1,3,4-Oxadiazole 1 5 (1 [(4 methylphenyl)sulfonyl] 4 piperidinyl) 1,3,4 oxadiazole 2 thiol 1 Anti-cancer activity 1 Article 1 Ethyl isonipecotate 1 IC50 1 MTT assay 1 Propanamides antineoplastic activity 1 carbon nuclear magnetic resonance 1 doxorubicin 1 drug synthesis 1 ethyl 1 [(4 methylphenyl)sulfonyl] 4 piperidine carbohydrazide 1 ethyl 1 [(4 methylphenyl)sulfonyl] 4 piperidinecarboxylate 1 in vitro study 1 mass spectrometry 1 n (2 ethylphenyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n (2 methoxyphenyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n (2 methylphenyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n (2 phenylethyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n (2,3 dimethylphenyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n (2,4 dimethylphenyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n (2,5 dimethylphenyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n (2,6 dimethylphenyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n (4 ethylphenyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n (phenylmethyl) 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n [2 (4 methoxyphenyl)ethyl] 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 n phenyl 2 [[5 [1 [(4 methylphenyl)sulfonyl] 4 piperidinyl] 1,3,4 oxadiazol 2 yl]thio] propanamide 1 propionamide derivative 1 proton nuclear magnetic resonance 1