• Reactant for preparation of 2-[(2,3-Dihydro-1H-indol-1-yl)methyl]melatonin analogs as novel MT2-selective melatonin receptor antagonists1 • Reactant for synthesis of isoindigo and azaisoindigo glycosides as anticancer agents2 • Reactant for preparation of arylfurancarboxamides with Nav1.8 voltage-gated Na channel blocking/analgesic activities3 • Reactant for preparation of bicyclic benzamides as 5-HT1 receptor agonists4 • Reactant for preparation of antiarrhythmic benzopyrans5 • Reactant for preparation of 5-HT2C/2B receptor antagonists6