3735493 -OEChem-02060822572D 0 0 0 0 0 0 0 0 0999 V2000 M END > 3735493 > 2 > ChemIDplus > 021112209 > 21112-20-9 Chalcocite > 21112-20-9 > 021112209 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=021112209 $$$$