PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 23333444-3 2013 The alpha-linked disaccharide obtained was subsequently transformed into alpha-galactosyl ceramide in four steps involving Z-selective Wittig olefination at C-1, stereo-inversion at C-4 using azide, one-pot reduction of azide and amidation, and global deprotection. Azides 192-197 complement C4A (Rodgers blood group) Homo sapiens 182-185