682638 -OEChem-02060822462D 1 0 0 0 0 0 0 0 0999 V2000 0.3167 -4.2417 0.0000 Pa 0 0 0 0 0 0 0 0 0 0 0 0 M ISO 1 1 231 M END > 0 > 0 > 682638 > 3 > ChemIDplus > 014331852 > 14331-85-2 231Pa Protactinium, isotope of mass 231 Protactinium-231 > 14331-85-2 > 014331852 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=014331852 > 105147 1 $$$$