Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Chemicke Zvesti called Furan derivatives. LXXX. Synthesis and properties of substituted furfurylideneoxindoles, Author is Kovac, J.; Stetinova, J., which mentions a compound: 2689-65-8, SMILESS is IC1=CC=C(O1)C=O, Molecular C5H3IO2, COA of Formula: C5H3IO2.
Oxindoles I (R1 = R2 = H, R = H, NO2, Cl, Br, I, Me, MeS, CO2Me, p- and m-O2NC6H4, Me2N; R1 = H, R2 = NO2, R = H, Cl, Br, I, Me, MeS, Ac, 4-O2NC6H4; R1 = Ac, R2 = H, R = H, NO2, Cl, Br, I, Me, MeS, NMe2) were prepared by condensation of oxindole, 5-nitrooxindole, and 1-acetyloxindole, resp., with the resp. furancarboxyaldehydes, some I (R1 = Ac) were prepared by acetylation of I (R1 = H). UV, IR and mass spectra of I were interpreted.
Although many compounds look similar to this compound(2689-65-8)COA of Formula: C5H3IO2, numerous studies have shown that this compound(SMILES:IC1=CC=C(O1)C=O), has unique advantages. If you want to know more about similar compounds, you can read my other articles.
Reference:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem