[1] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore
[2] Hangzhou Normal Univ, Key Lab Organosilicon Chem & Mat Technol, Minist Educ, Hangzhou 310012, Zhejiang, Peoples R China
[3] Natl Univ Singapore, Inst Life Sci, Med Chem Program, Singapore 117543, Singapore