This small molecule, N-(3-phenyl-2-propenyl)-1-deoxynojirimycin (ppDNM), is a research tool for studying HIV-1 glycoprotein maturation. It inhibits HIV-1 infectivity and syncytium formation in vitro by altering gp120 glycosylation, as evidenced by reduced Con A lectin binding. Its applications include research in virology, glycobiology, and antiviral drug discovery.