Bilirubin structure



Hi All,
 I am looking for the molecular structure of
 Bilirubin. Calculated structure or X-ray
 determined structure or any other approximate
 structure will do my job.
 Any help will be highly appreciated.
 With thanks in advance,
 Dr. Tapan K. Ghanty
 Theoretical Chemistry Section
 Chemistry Division
 Bhabha Atomic Research Centre
 Trombay, Mumbai 400 085
 India