Green Synthesis of Tetrahydropyrazino[2,1-a:5,4-a′]diisoquinolines as SARS-CoV‑2 Entry Inhibitors - Sowndarya Palla; Srinivasa Rao Palla; Jia-Jin Liu; Tai-Ling Chao; Ting-Hui Lee; Veerababurao Kavala; I-Chen Liu; Lily Hui-Ching Wang; Sui-Yuan Chang; Ching-Fa Yao; Po-Huang Liang (ACS Omega)