PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15624931-5 2005 The effect on enantioselectivity of the carbon chain length of the R group located (1) on the C-3 substituent of 4a-d, 6a-d, and 7a-d or (2) at C-5 in 8a-d and 9a-g was studied in detail. Carbon 40-46 complement C3 Homo sapiens 94-97