Echigo, Shizue; Castellanos, Leonardo; Duque, Carmenza; Uekusa, Hidehiro; Hara, Noriyuki; Fujimoto, Yoshinori Journal of the Brazilian Chemical Society, 2011, vol. 22, # 5 p. 997 - 1004 doi: 10.1590/S0103-50532011000500026