PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 32815577-3 2021 A combination of Diels-Alder and Scholl-type-oxidation reactions involving a symmetric di-NDI-tolane precursor were crucial for the very selective formation of the helical superstructure 3 via the hexa-phenyl-benzene (HPB) derivative 2 . 4-hydoxy-1-(3-pyridyl)-1-butanone 218-221 hexosaminidase subunit alpha Homo sapiens 197-201