Rahman, M.M. et al. 2026. Efficient synthesis of structurally diverse polysubstituted non-fused pyrimidines (NFPs) and their derivatives via four-component reaction (4-CRs) protocols. Brazilian Journal of Science. 5, 10 (Jun. 2026), 72–94. DOI:https://doi.org/10.14295/bjs.v5i10.909.