3734073 -OEChem-02060822572D 0 0 0 0 0 0 0 0 0999 V2000 M END > 3734073 > 2 > ChemIDplus > 014255039 > 14255-03-9 44Ca Calcium, isotope of mass 44 Calcium-44 > 14255-03-9 > 014255039 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=014255039 $$$$