• Watanabe T et al. Yakugaku Zasshi. 2004 Mar;124(3):99-111
• Mazzetti, I., et al.: Clin. Sci., 101, 593 (2000)
• Cimen, M., et al.: Clin. Rheumatology, 19, 275 (2000)
• Criswell, L., et al.: Am. J. Med., 112, 465 (2000)
• Undergoes lithiation with n-BuLi at the methylene group; see, e.g.: Synth. Commun., 20, 477 (1990).