PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 33268656-3 2020 Extensive computational studies revealed that the driving force of the facile hydration of 9 is probably release of the ring strain of 9, which arises in part from the bent sp2-hybridized C3a carbon. Carbon 192-198 complement C3 Homo sapiens 188-191