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, Collection of Czechoslovak Chemical Communications called Furan derivatives. LXXXII. Kinetics of the condensation of 5-nitro-2-furfuryl dichloromethyl sulfone with aldehydes, Author is Hrdina, M.; Jurasek, A.; Knoppova, V., which mentions a compound: 2689-65-8, SMILESS is IC1=CC=C(O1)C=O, Molecular C5H3IO2, Electric Literature of C5H3IO2.
The kinetics of condensation of I with II (R = H, Me, Cl, Br, iodo, CO2Me, NO2) and III (R1 = H, 4-Me, 4-Cl, 3,4-Cl2, 4-Br, 4-CO2Et, 2-NO2, 3-NO2, 4-NO2), resp., were correlated with substituent constants
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Reference:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem