• Tasaka, A., et al.: Chem. Pharma. Bull., 41, 1035 (1989)
• Abdou, N., et al.: J. Pharm. Sci., 6, 25 (1989)
• Prasad, A., et al.: Eur. J. Med. Chem., 24, 199 (1989)
• Starting material for an efficient Fischer indole synthesis of the 5-HT1D receptor agonist avitriptan: J. Org. Chem., 62, 9192 (1997).