Nicolaou; Li, Yiwei; Fylaktakidou, Konstantina C.; Mitchell, Helen J.; Wei, Heng-Xu; Weyershausen, Bernd Angewandte Chemie - International Edition, 2001, vol. 40, # 20 p. 3849 - 3854 doi: 10.1002/1521-3773(20011015)40:20<3849::AID-ANIE3849>3.0.CO;2-M