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 Chemical shifts observed in Lα X-ray emission lines of elements in the range of 26 ≤ Z ≤ 30 in their halogen compounds, published in 2012-05-31, which mentions a compound: 13940-83-5, Name is Nickel(ii)fluoridetetrahydrate, Molecular F2H8NiO4, Formula: F2H8NiO4.
The chem. shifts and full widths at half maximum intensity of Lα x-ray emission lines of elements in the range 26 ≤ Z ≤ 30 were studied in their halogen compounds using a wavelength-dispersive X-ray fluorescence spectrometry. The chem. shifts for F based compounds are higher than that of Cl and Br based compounds
From this literature《Chemical shifts observed in Lα X-ray emission lines of elements in the range of 26 ≤ Z ≤ 30 in their halogen compounds》,we know some information about this compound(13940-83-5)Formula: F2H8NiO4, but this is not all information, there are many literatures related to this compound(13940-83-5).
Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider