reproducible preparations are given for salts of the following l-amino acid derivatives : bpoc-ala-oh , bpoc-arg ( mtr ) -oh , bpoc-asn-oh , bpoc-asp ( otbu ) -oh , bpoc-cys ( acm ) -oh , bpoc-cys ( s-tbu ) -oh , bpoc-gln-oh , bpoc-glu ( otbu ) -oh , bpoc-gly-oh , bpoc-ile-oh , bpoc-leu-oh , n-alpha-bpoc-lys ( epsilon-boc ) -oh , bpoc-met-oh , bpoc-phe-oh , bpoc-pro-oh , bpoc-ser ( otbu ) -oh , bpoc-thr ( otbu ) -oh , bpoc-tyr-oh , bpoc-val-oh .
C0017797
gln
C0061472
glu