(But-cys18)(19-37)-fragment betacgrp 137908-73-7 Betacgrp (19-37), t-butyl-cys(18)- Calcitonin gene-related peptide (19-37), t-butyl-cys(18)- Calcitonin gene-related peptide (19-37), t-butyl-cysteine(18)- t-Butyl-cys(18)-cgrp (19-37)