PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21481103-3 2013 indicate that 6-monoacetylmorphine (6-MAM), and not morphine, is the active metabolite responsible for the acute effects observed for heroin. 6-O-monoacetylmorphine 14-34 PZP, alpha-2-macroglobulin like Mus musculus 38-41