6-[(5-hydroxypentyl)amino]-5-[(E)-(2-oxopropylidene)amino]uracil
6-[(5-hydroxypentyl)amino]-5-[(e)-(2-oxopropylidene)amino]uracil
A nucleobase analogue that is uracil substituted with a (5-hydroxypentyl)amino group at position 6 and an (<i>E</i>)-(2-oxopropylidene)amino group at position 5; one of 20 modifications to the potent microbial riboflavin-based metabolite antigen 5-(2-oxopropylideneamino)-6-<small>D</small>-ribityl aminouracil (5-OP-RU), an activator of mucosal-associated invariant T (MAIT) cells when presented by the MR1 protein (reported in MED:32123373).