EB-0156 is a potent inhibitor of ER α-glucosidases (α-Glu) Iand II with IC50s of 0.0479 and less than 0.001 μM, respectively. EB-0156 is a N-substituted derivative of valiolamine with broad-spectrum antiviral. EB-0156 has the potential for the reseach of broad-spectrum agent against the existing and emerging viruses.