Talk:Heme B

How should the structure be drawn?
Compare the Wikipedia structure with the PubChem structure and notice the difference in MF. Also, what is the best representation for the structure? WP or PubChem? I'd like to know the consensus to reproduce it in ChemSpider since there are THREE representations in CS .--ChemSpiderMan (talk) 18:24, 13 January 2008 (UTC)