3748907 -OEChem-02060822572D 0 0 0 0 0 0 0 0 0999 V2000 M END > 3748907 > 2 > ChemIDplus > 063993497 > 63993-49-7 Antibiotic SF-1540-B SF-1540 B > 63993-49-7 > 063993497 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=063993497 $$$$