Asymmetric synthesis, in particular enantioselectivity, has permitted the assembly of complex molecules; consequently, many clinical trials are going on to compare the efficacy and safety of each pair of enantiomers. In this sense, to envisage the suitability to synthesize the (S)-stereoisomers (hypothetical) of (R)-perezone, (R)-isoperezone and their corresponding sulfurderivatives, in this work, their molecular properties (geometrical, electronic, and spectroscopic) and chemical reactivity descriptors at the theoretical level were compared with the results of the previously studied (R)-stereoisomers, using DFT/ B3LYP/6-311 + + G(d,p), in agreement between both (S/R)enantiomers. Concerning the electronic properties, the 6isopropylsulfanyl-(8S)-perezone (1 a) and 6-benzylsulfanyl-(8R)-perezone (2 c) are hard molecules, in addition (8R)-isoperezone (4), 3-benzylsulfanyl-(8S)-isoperezone (3 c), and 6-benzylsulfanyl-(8S)-perezone (1 c) displayed comparable features to 6benzylsulfanyl-(8R)-perezone (2 c). The docking studies showed that (S)-derivatives exhibited a lower affinity to COX-2 due to steric hindrance. Thus, 2 c showed the highest affinity to COX-2 (ΔG = À 9.53 kcal/mol). The highest differences in ΔG values were shown between 1 c and 2 c, while the lowest differences in ΔG values were displayed by 3 a and 4 a. Finally, the biological activity prediction for the hypothetic (S)-compounds revealed anti-neoplasic activity, consequently their synthesis is recommended.