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 Aliphatic and aromatic glucosides from Anoectochilus koshunensis, published in 1993-07-31, which mentions a compound: 58081-05-3, Name is (R)-4-Hydroxydihydrofuran-2(3H)-one, Molecular C4H6O3, HPLC of Formula: 58081-05-3.
A new simple aliphatic glucoside, 3-(R)-3-β-D-glucopyranosyloxybutanolide (kinsenoside) with its congeners and a heterocyclic aromatic glucoside, β-glucopyranosyl-3-pyridinemethanol (nicoloside) were isolated from whole plants of A. koshunensis. Their structures were elucidated from chem. and spectroscopic evidence.
Although many compounds look similar to this compound(58081-05-3)HPLC of Formula: 58081-05-3, numerous studies have shown that this compound(SMILES:O=C1OC[C@H](O)C1), has unique advantages. If you want to know more about similar compounds, you can read my other articles.
Reference:
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem