PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16392857-3 2006 Cycloadditions of allene and CO2, CS2, or OCS lead in part to the same four-membered products as dimerizations of either ketene or thioketene or addition of ketene and thioketene, respectively. ketene 121-127 chorionic somatomammotropin hormone 2 Homo sapiens 34-37 16392857-3 2006 Cycloadditions of allene and CO2, CS2, or OCS lead in part to the same four-membered products as dimerizations of either ketene or thioketene or addition of ketene and thioketene, respectively. ketene 135-141 chorionic somatomammotropin hormone 2 Homo sapiens 34-37