744819 -OEChem-02060822472D 1 0 0 0 0 0 0 0 0999 V2000 5.3146 1.2279 0.0000 Bk 3 0 0 0 0 0 0 0 0 0 0 0 M ISO 1 1 250 M END > 0 > 0 > 744819 > 3 > ChemIDplus > 015755530 > 15755-53-0 250Bk Berkelium, isotope of mass 250 Berkelium-250 > 15755-53-0 > 015755530 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=015755530 > 167376 1 $$$$