In 1949, Saul Winstein observed that 2-exo-norbornyl brosylate (p-bromobenzenesulfonate) and 2-endo-norbornyl tosylate (p-toluenesulfonate) gave a racemic mixture of the same product, 2-exo-norbornyl acetate, upon acetolysis (see Figure 6).
On 2 October the Group hosted special concert to mark the 20th anniversary of South Korea and China's diplomatic ties, with performers including along Kim Jang-hoon, Super Junior-M and EXO-K.