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 Studies on the synthesis of porphyrin a. II. Synthesis of porphyrins with higher saturated and unsaturated acyl substituents, published in 1976, which mentions a compound: 2199-44-2, Name is Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, Molecular C9H13NO2, Electric Literature of C9H13NO2.
Deuteroporphyrins IX [I, R1 = Me2C:CH(CH2)2CMe:CH(CH2)2CMe:CHCH2, Me2CH(CH2)3CHMe(CH2)3CHMe(CH2)2, Me2CBrCHBr(CH2)2CBrMeCHBr(CH2)2CBrMeCHBrCH2] were obtained in 33-92% yields by cyclization of the corresponding biladienes II, prepared from a pyrrole derivative and a tripyrrene.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com