PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15760187-3 2005 Indolizine 6, containing an ester group at C-6, was reductively alkylated to give dihydroindolizines 8 and 9 possessing a quaternary carbon center in good yield. Esters 28-33 complement C6 Homo sapiens 43-46