V. Gut et al., The peptides of alpha-aminosuberic acid II. Synthesis of deamino-dicarba-eel-calcitonin sequence 1-9, AMINO ACIDS, 21(3), 2001, pp. 255-263
The paper describes the synthesis of Asu(6)-octapeptide derivatives by cond
ensing two alternative pentapeptide fragments with Asu-containing tripeptid
es. After partial deprotection these linear peptides compounds are subject
to cyclization experiments aimed to give the N-terminal [1-9] sequence of d
eamino-dicarba-eel calcitonin. This is a key substance for the semi-synthes
is of the respective analogues of eel calcitonin.