3742389 -OEChem-02060822572D 0 0 0 0 0 0 0 0 0999 V2000 M END > 3742389 > 2 > ChemIDplus > 050645802 > 50645-80-2 Des(tetrapeptide)(B1-B4)-insulin Insulin, 1B-de-L-phenylalanine-2B-de-L-valine-3B-de-L-asparagine-4B-de-L-glutamine- Insulin, des(tetrapeptide)(B1-B4)- > 50645-80-2 > 050645802 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=050645802 $$$$