Popsavin, Velimir; Benedekovic, Goran; Sreco, Bojana; Popsavin, Mirjana; Francuz, Jovana; Kojic, Vesna; Bogdanovic, Gordana Organic Letters, 2007, vol. 9, # 21 p. 4235 - 4238 doi: 10.1021/ol701734s