Symbols and Abbreviations,continued SUBSTITUENT GROUPS.continued an acetyl group: CHa-C :-Hx a cyclohexyl group: Ts Boc a rert-butoxycarbonyl group (amino acid and peptide chemistry):(CHa)C-- a carbobenzoxy(benzyloxycarbonyl)group(amino acid and peptide chemistry) -cH2-0-C REAGENTS AND SOLVENTS DCC -N=C=N- DMSO dimethylsulfoxide ether diethyl ether,CHCH2OCHCH generic acid:the conjugate base may appear as:A LG leaving group MCPBA meta-chloroperoxybenzoic acid -0-0 MVK methyl vinyl ketone H:C NBS W-bromosuccinimide continued on next page vi进 Copyright 2013 Pearson Education,Inc