PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12117615-2 2002 The reactions are regio- and stereoselective; in fact, in the presence of more than one C=O group, the oxido or aziridino functions are formed uniquely at the C=O of C-17 (or C-20 depending on its position in the starting molecule), and the C-20(R) stereoisomer is often the only product isolated. Carbon 88-89 cytokine like 1 Homo sapiens 166-170 12117615-2 2002 The reactions are regio- and stereoselective; in fact, in the presence of more than one C=O group, the oxido or aziridino functions are formed uniquely at the C=O of C-17 (or C-20 depending on its position in the starting molecule), and the C-20(R) stereoisomer is often the only product isolated. Carbon 159-160 cytokine like 1 Homo sapiens 166-170