PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9514608-7 1998 Conclusively, it is considered that the hydroxyl groups of alkaloids, especially a free OH group of 2 at C-6, are important for action on the peripheral vasculature leading to dilatation, and these results indicated that esterification of the hydroxyl group at C-15 with either acetate or benzoate may contribute to enhancement of the activity of the parent alkaloids. Benzoates 289-297 complement component 6 Mus musculus 105-108