Showing structure for {[(2r,3r,4s,5s)-3,4-dihydroxy-5-(4-hydroxy-2-oxopyrimidin-1-yl)oxolan-2-yl]methoxy(hydroxy)phosphoryl}oxy([(2r,3r,4s,6s)-3,4-dihydroxy-6-methyl-5-oxooxan-2-yl]oxy)phosphinic acid