Heteroatoms constitute a very common fragment of a number of active pharmaceutical ingredients as well as excipients; from the point of view of significance, it is all the same if these are isosterically/bioisosterically replaced carbons/carbon substructures in aliphatic structures or real heterocycles [...].

Department of Analytical Chemistry Faculty of Natural Sciences Comenius University Ilkovicova 6 842 15 Bratislava Slovakia

Regional Centre of Advanced Technologies and Materials Faculty of Science Palacky University Slechtitelu 27 783 71 Olomouc Czech Republic

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