... Angewandte Chemie: Previous article in issue: Synthetic Studies on Chartelline C: Stereoselective Construction of the Core Skeleton ... The doubled-shelled YSNs exhibit high BET surface areas of 708 m 2 g −1 with a total pore volume of 0.81 cm 3 g −1 ... Ed. 2012, 51, 5935–5940. ...