PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
26245308-4	2015	Furthermore, the synthetic potential of these syn-Michael adducts is demonstrated by 1,4-addition of nucleophiles on the butenolide substructure.	butenolide	121-131	synemin	Homo sapiens	17-20	
31573594-2	2019	The beta,gamma-butenolides gave a syn-selective MCR adduct with a dr up to 11.5 : 1.	butenolide	9-26	synemin	Homo sapiens	34-37