Novel Catalyst-Free Synthesis of Some 3‑Alkylaminoquinoxaline-2(1H)‑thiones and 3‑Alkyloxyquinoxaline-2(1H)‑thiones in Ethanol - Samir M. El Rayes; Ibrahim A. I. Ali; Walid Fathalla; Mohamed A. Ghanem; Afaf H. El-Sagheer (ACS Omega)