• Eur. Pat., 1992, Sankyo, 503 785; CA, 118, 22240k, (CS 866, RNH 6270, synth, pharmacol)
• Mizuno, M. et al., Eur. J. Pharmacol., 1995, 285, 181-188, (pharmacol, CS 866, RNH 6270)
• Yanagisawa, H. et al., J. Med. Chem., 1996, 39, 323-328, (synth, CS 866, RNH 6270, pmr, ir, pharmacol)