PMID-sentid	Pub_year	Sent_text	compound_name	comp_offset	prot_official_name	organism	prot_offset
19666465-1	2009	Tetrahyrobiopterin (BH4) is a required cofactor for the synthesis of nitric oxide by endothelial nitric-oxide synthase (eNOS), and BH4 bioavailability within the endothelium is a critical factor in regulating the balance between NO and superoxide production by eNOS (eNOS coupling).	tetrahyrobiopterin	0-18	nitric oxide synthase 3	Homo sapiens	85-118