5-(2-oxopropylideneamino)-6-D-ribitylaminouracil
5-(2-oxopropylideneamino)-6-d-ribitylaminouracil
An aminouracil that is <small>D</small>-ribitol in which the hydroxy group at position 1 is substituted by the 6-amino group of 6-amino-5-(2-oxopropylideneamino)uracil. Unstable mucosal-associated invariant T (MAIT)-activating antigen, formed by non-enzymatic reaction between 5-amino-6-<small>D</small>-ribitylaminouracil and methylglyoxal.