In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Free energy relationships of ionization energies measured by ultraviolet photoelectron spectroscopy in substituted pyrroles, published in 1981-04-30, which mentions a compound: 2199-44-2, Name is Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, Molecular C9H13NO2, SDS of cas: 2199-44-2.
The ionization energies of six 5-substituted-3-ethoxycarbonyl-2,4-dimethylpyrroles and seven 4-substituted 2-ethoxycarbonyl-3,5-dimethylpyrroles were determined by UPS. The relations between the lowest ionization potentials and σ were determined and the different influence of substituents in the α- and β-positions is discussed.
In some applications, this compound(2199-44-2)SDS of cas: 2199-44-2 is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.
Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com