Useful intermediates for synthesis of dicarba analogs of cystine peptides: selectively protected .alpha.-aminosuberic acid and .alpha.,.alpha.'-diaminosuberic acid of defined stereochemistry
Useful intermediates for synthesis of dicarba analogs of cystine peptides: selectively protected .alpha.-aminosuberic acid and .alpha.,.alpha.'-diaminosuberic acid of defined stereochemistry