The molecule is a UDP-D-apiose in which the anomeric centre of the apiose fragment has alpha-configuration. It is a conjugate acid of an UDP-alpha-D-apiose(2-).
[(2R,3R,4R)-3,4-dihydroxy-4-(hydroxymethyl)oxolan-2-yl] [[(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl] hydrogen phosphate