3732730 -OEChem-02060822572D 0 0 0 0 0 0 0 0 0999 V2000 M END > 3732730 > 2 > ChemIDplus > 012156331 > 1-(3-(Azulen-1-yl)-2-oxido-4-oxocyclobut-2-en-1-ylidene)-1,-dihydroazulenylium 12156-33-1 EINECS 235-277-9 > 12156-33-1 > 012156331 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=012156331 $$$$