PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
14664599-2	2003	Nucleophilic substitutions of C-3 and C-4 alkyl-substituted tetrahydropyran acetates proceeded via pseudoequatorially substituted oxocarbenium ions, as would be expected by consideration of steric effects.	oxocarbenium	130-142	complement C4A (Rodgers blood group)	Homo sapiens	38-41	
15176819-1	2004	[reaction: see text] The utility of the inside attack model to predict and analyze the stereoselectivities of nucleophilic additions to complex five-membered ring oxocarbenium ions is demonstrated in a systematic study of C-4-substituted acetals.	oxocarbenium	163-175	complement C4A (Rodgers blood group)	Homo sapiens	222-225