Abdullah, R.N. 2026. Synthesis, spectroscopic characterization, and combined DFT/GFN2-xTB study of ethyl 4-[2-(3-hydroxy-4-methoxyphenyl)-4,9-dioxo-2,3,4,9-tetrahydro-1,3-benzoxazepin-3-yl] benzoate. Journal of Integral Sciences. 9, 2 (Aug. 2026), 30-45. DOI:https://doi.org/10.37022/jis.v9i2.149.